1972 Hardtops - CorvetteForum - Chevrolet Corvette Forum Discussion


C3 Tech/Performance
V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette

1972 Hardtops

Reply
 
 
 
Thread Tools Search this Thread
Old 10-09-2017, 10:23 AM   #1
SnottyL79
Junior Member
Thread Starter
 
Member Since: Oct 2017
Posts: 6
Thanked 0 Times in 0 Posts
Default 1972 Hardtops

In 1972, could a Corvette be ordered as a removable hardtop only car? If so, would there be any provisions from the factory when new to install a convertible top if desired later on?
SnottyL79 is offline   Reply With Quote
Old 10-09-2017, 10:45 AM   #2
Alan 71
CF Senior Member
 
Alan 71's Avatar
 
Member Since: Sep 2006
Location: Westminster Maryland
Posts: 28,275
Thanks: 0
Thanked 2,075 Times in 1,840 Posts
Default

Hi S,
Welcome!

Yes, for the 72 model year a car could be ordered with just a hardtop.

I'm uncertain what if anything would have been deleted from the car when it was a hard-top only car.
Alan 71 is online now   Reply With Quote
Old 10-09-2017, 12:45 PM   #3
SnottyL79
Junior Member
Thread Starter
 
Member Since: Oct 2017
Posts: 6
Thanked 0 Times in 0 Posts
Default 1972 Hardtops

Alan 71, thanks for the reply. So I'm assuming there would be "pin" holes on the "flip up deck" for a convertible top regardless. Would there be two separate sets of "pin" holes like a C2 convertible (one for convertible top and one for hardtop") or is it just one for both tops? Am not familiar with the hardtop itself...does it have "pins" or "posts" along the bottom to fit those holes or just tabs to screw in the inside of the car near the top of the door to hold it down?
SnottyL79 is offline   Reply With Quote
Old 10-09-2017, 01:02 PM   #4
mortgageguy
CF Senior Member
 
Member Since: Mar 2006
Location: Spartanburg SC
Posts: 664
Thanked 89 Times in 78 Posts
Default

Just one set of pin holes for both tops. The hard top has two threaded studs that fit in the holes and a bracket slips over the studs on the under side followed by nuts to secure it.
mortgageguy is offline   Reply With Quote
Old 10-09-2017, 01:29 PM   #5
SnottyL79
Junior Member
Thread Starter
 
Member Since: Oct 2017
Posts: 6
Thanked 0 Times in 0 Posts
Default

Thanks for your help, Mortgageguy...much appreciated.
SnottyL79 is offline   Reply With Quote
Old 10-09-2017, 01:39 PM   #6
SnottyL79
Junior Member
Thread Starter
 
Member Since: Oct 2017
Posts: 6
Thanked 0 Times in 0 Posts
Default 1972 Hardtops

Thanks for your reply, Mortgageguy.
So if I was to attempt to install a convertible top frame on a "factory hardtop only" '72, are there provisions where the frame would attach to the inside of the car or would something have to be fabricated"
SnottyL79 is offline   Reply With Quote
Old 10-09-2017, 04:16 PM   #7
theandies
CF Senior Member
 
theandies's Avatar
 
Member Since: Jun 2001
Location: "The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants."
Posts: 15,008
Thanked 104 Times in 91 Posts
Default

There should also be a small hole in the center of the deck lid where the hard top sits. I'm not sure if this hole is present if the hard top was not ordered from the factory as the convertible top doesn't use this hole. When not using the hard top there is a small plug that goes into this hole. I'll be installing my hard top soon and will take some more pictures for you.

Don't know what year this is but you can see the small hard top center hole in this picture.


Last edited by theandies; 10-09-2017 at 04:17 PM.
theandies is online now   Reply With Quote
The Following User Says Thank You to theandies For This Useful Post:
SnottyL79 (10-09-2017)
Old 10-09-2017, 05:05 PM   #8
68BLUEVETTE
CF Senior Member
 
68BLUEVETTE's Avatar
 
Member Since: Apr 2004
Location: Easton PA
Posts: 237
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by theandies View Post
There should also be a small hole in the center of the deck lid where the hard top sits. I'm not sure if this hole is present if the hard top was not ordered from the factory as the convertible top doesn't use this hole. When not using the hard top there is a small plug that goes into this hole. I'll be installing my hard top soon and will take some more pictures for you.

Don't know what year this is but you can see the small hard top center hole in this picture.

my 68 doesn't have that hole, nor does the hardtop have an extra pin there, and was a hardtop from factory. Is this just another 68 special? I htought the hardtops were at least the same through all the years.
68BLUEVETTE is offline   Reply With Quote
Old 10-09-2017, 05:17 PM   #9
theandies
CF Senior Member
 
theandies's Avatar
 
Member Since: Jun 2001
Location: "The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants."
Posts: 15,008
Thanked 104 Times in 91 Posts
Default

Quote:
Originally Posted by 68BLUEVETTE View Post
my 68 doesn't have that hole, nor does the hardtop have an extra pin there, and was a hardtop from factory. Is this just another 68 special? I htought the hardtops were at least the same through all the years.
I know '68's didn't have the center hole/pin and am not sure when GM added it. '68's also don't have the chrome tips on the rear points of the top either.
theandies is online now   Reply With Quote
Old 10-09-2017, 05:19 PM   #10
Alan 71
CF Senior Member
 
Alan 71's Avatar
 
Member Since: Sep 2006
Location: Westminster Maryland
Posts: 28,275
Thanks: 0
Thanked 2,075 Times in 1,840 Posts
Default

Hi,
In looking at the Hardtop Option section in the AIM it appears that the center hole was drilled as part of the hardtop option.

The sheet for mounting the hardtop seems to indicate the bracket that attached to the rear center of the hardtop may have been used as a guide for where to drill the hole in the deck lid.
UPC CO7, Sheet A6 in the 71 AIM. I'd think it would be the same for 72.
The hole is called out as 1/2" +- 1/64".

Regards,
Alan
Alan 71 is online now   Reply With Quote
The Following User Says Thank You to Alan 71 For This Useful Post:
theandies (10-09-2017)
Old 10-09-2017, 05:25 PM   #11
SnottyL79
Junior Member
Thread Starter
 
Member Since: Oct 2017
Posts: 6
Thanked 0 Times in 0 Posts
Default

Thanks again, Alan 71,,,would you know if I was to try to install a convertible frame on a "hardtop only" car, are there provisions in the inside of the car to readily install it or would something have to be fabricated?
SnottyL79 is offline   Reply With Quote
Old 10-09-2017, 05:44 PM   #12
Alan 71
CF Senior Member
 
Alan 71's Avatar
 
Member Since: Sep 2006
Location: Westminster Maryland
Posts: 28,275
Thanks: 0
Thanked 2,075 Times in 1,840 Posts
Default

Hi S,
I really don't know.

Do you know about the Assembly Instruction Manuals that are available from many vendors and were used on the production line in St.Louis?
The one for each year of production.

There is a section of about 6 sheets devoted to the soft top installation on the production line.

If you buy a manual you's be able to look through the installation while looking at your car to see what's going to be involved in installing the top and it's operating mechanism.

Are you certain you car was a hardtop only car or is it a car that's had the soft top removed at some time?
Regards,
Alan
Alan 71 is online now   Reply With Quote
The Following User Says Thank You to Alan 71 For This Useful Post:
SnottyL79 (10-09-2017)
Old 10-09-2017, 05:45 PM   #13
theandies
CF Senior Member
 
theandies's Avatar
 
Member Since: Jun 2001
Location: "The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants."
Posts: 15,008
Thanked 104 Times in 91 Posts
Default

Quote:
Originally Posted by SnottyL79 View Post
Thanks again, Alan 71,,,would you know if I was to try to install a convertible frame on a "hardtop only" car, are there provisions in the inside of the car to readily install it or would something have to be fabricated?
Those would be behind the 1/4 trim panels at the seat backs. You should see a serrated portion of the pillar post and two holes with captured nuts inside and that is where the soft-top is mounted. This is also a major adjustment point for the soft-top. The rear deck holes are used by both tops.
My guess is all convertibles were made with the soft-top installation points regardless if it was ordered as a hard top car only. Coupes and Verts have a different VIN so I'd think the convertible birdcage when fabricated would automatically get the attachment points especially if it came from another plant. Not sure what the GM logistic's for Corvette production was back then.

If it was ordered hard top only I suspect it is very rare.

Last edited by theandies; 10-09-2017 at 05:49 PM.
theandies is online now   Reply With Quote
Old 10-09-2017, 06:38 PM   #14
SnottyL79
Junior Member
Thread Starter
 
Member Since: Oct 2017
Posts: 6
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by theandies View Post
Those would be behind the 1/4 trim panels at the seat backs. You should see a serrated portion of the pillar post and two holes with captured nuts inside and that is where the soft-top is mounted. This is also a major adjustment point for the soft-top. The rear deck holes are used by both tops.
My guess is all convertibles were made with the soft-top installation points regardless if it was ordered as a hard top car only. Coupes and Verts have a different VIN so I'd think the convertible birdcage when fabricated would automatically get the attachment points especially if it came from another plant. Not sure what the GM logistic's for Corvette production was back then.

If it was ordered hard top only I suspect it is very rare.
Theandies, am appreciative of your input...makes sense that the Corvettes had convertible framing provisions for both "hardtop only" and convertibles. Kind of suspected that was the case...will check the areas you mentioned where the two holes and captured nuts are located. Thanks again.
SnottyL79 is offline   Reply With Quote
Old 10-10-2017, 08:46 AM   #15
Easy Mike
CF Senior Member
Support Corvetteforum!
Cruise-In II Veteran
 
Easy Mike's Avatar
 
Member Since: Jun 2000
Location: The Bluegrass State
Posts: 34,832
Thanks: 0
Thanked 562 Times in 516 Posts
Default

Quote:
Originally Posted by theandies View Post
...especially if it came from another plant...
FWIW: all C3 bird cages, coupe and convertible, were welded up in the basement at St. Louis. They were not provided by an outside source.

Quote:
...Not sure what the GM logistic's for Corvette production was back then...
Simple: To sell cars.
Easy Mike is offline   Reply With Quote
Old 10-10-2017, 04:56 PM   #16
theandies
CF Senior Member
 
theandies's Avatar
 
Member Since: Jun 2001
Location: "The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants."
Posts: 15,008
Thanked 104 Times in 91 Posts
Default

Quote:
Originally Posted by Easy Mike View Post
FWIW: all C3 bird cages, coupe and convertible, were welded up in the basement at St. Louis. They were not provided by an outside source.
So if the birdcages were all welded up at St. Louis were all the birdcage structural members also manufactured (in the attic ) at the St. Louis plant or outsourced?

I'm waiting to see SnottyL79 responce.
theandies is online now   Reply With Quote
Old 10-10-2017, 10:37 PM   #17
mortgageguy
CF Senior Member
 
Member Since: Mar 2006
Location: Spartanburg SC
Posts: 664
Thanked 89 Times in 78 Posts
Default

Quote:
Originally Posted by 68BLUEVETTE View Post
my 68 doesn't have that hole, nor does the hardtop have an extra pin there, and was a hardtop from factory. Is this just another 68 special? I htought the hardtops were at least the same through all the years.
My 72 does'nt either. I bought mine when it was one year old. I feel very confidant it was a factory hardtop car.
mortgageguy is offline   Reply With Quote
Old 10-11-2017, 05:32 AM   #18
theandies
CF Senior Member
 
theandies's Avatar
 
Member Since: Jun 2001
Location: "The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants."
Posts: 15,008
Thanked 104 Times in 91 Posts
Default

Quote:
Originally Posted by mortgageguy View Post
My 72 does'nt either. I bought mine when it was one year old. I feel very confidant it was a factory hardtop car.
That's strange as I know my 1971 is a factory hardtop car and it came with the hole and pin. I bought it from the original owner and he bought it with the hardtop (or Auxiliary Hardtop as it was called).
theandies is online now   Reply With Quote
Old 10-11-2017, 04:55 PM   #19
mortgageguy
CF Senior Member
 
Member Since: Mar 2006
Location: Spartanburg SC
Posts: 664
Thanked 89 Times in 78 Posts
Default

Quote:
Originally Posted by theandies View Post
That's strange as I know my 1971 is a factory hardtop car and it came with the hole and pin. I bought it from the original owner and he bought it with the hardtop (or Auxiliary Hardtop as it was called).
I bought mine from a dealer, so it could have been added to it. I have always assumed it came factory. It was produced in the last week of production for the 72's.

Last edited by mortgageguy; 10-11-2017 at 04:57 PM.
mortgageguy is offline   Reply With Quote
Old 10-11-2017, 06:07 PM   #20
theandies
CF Senior Member
 
theandies's Avatar
 
Member Since: Jun 2001
Location: "The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants."
Posts: 15,008
Thanked 104 Times in 91 Posts
Default

Quote:
Originally Posted by mortgageguy View Post
I bought mine from a dealer, so it could have been added to it. I have always assumed it came factory. It was produced in the last week of production for the 72's.
Could be from the factory but I would assume that the hardtop could be a dealer installed option as well. Maybe your top was ordered after the car was bought originally???????? Hardtops are small and can be shipped easily to the factory.
That brings up if the hole and pin would be installed by the dealer if it came without them installed on the top at the time of arrival at the dealer.

BTW - Out of the Convertible with the top down, the Coupe and the Convertible with the Hardtop on - The hardtop look is what I like the best. IMO that is the way the Coupe should have been styled.










Hey Alan71 - another mystery production timeline convertible change thread.
theandies is online now   Reply With Quote
Go Back   CorvetteForum - Chevrolet Corvette Forum Discussion >
Reload this Page
  • 1972 Hardtops
  •  
     
    Reply


    Thread Tools Search this Thread
    Search this Thread:

    Click for Advanced Search

    Posting Rules
    You may not post new threads
    You may not post replies
    You may not post attachments
    You may not edit your posts

    BB code is On
    Smilies are On
    [IMG] code is On
    HTML code is Off
    Trackbacks are Off
    Pingbacks are Off
    Refbacks are Off

    Forum Jump

    Sponsored Ads
    Vendor Directory

    All times are GMT -4. The time now is 05:23 PM.


     
    • Ask a Question
      Get answers from community experts
    Question Title:
    Description:
    Your question will be posted in: