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

Summer project 76' vette

Thread Tools
 
Search this Thread
 
Old May 2, 2023 | 11:11 PM
  #21  
Greengear's Avatar
Greengear
Thread Starter
Racer
 
Joined: Aug 2018
Posts: 266
Likes: 52
Default

dropping in the gaskets without removing manifolds or down pipe flange worked as I had hoped. Exhaust leak is gone now.
I only had one bolt that threatened to break. I turned it back and forth with a 3/8 breaker bar and dribbled atf into the threads from a little oiler bottle.
test drive today with stock wheels and no exhaust leak was satisfying. I also removed the 1990’s alarm system.
I wasn’t planning to buy staggered tires but I like the look. The tires that came on the rims are ages old so I’ll buy the same sizes again. Looks like 225/60r15 in the front but I’m not seeing a clear chart to convert the vintage size on the back to modern sizes for ordering. It say HR60-15 on the rears that I want to match up. I’m seeing a HR60-15 = 245/60r15 online










Last edited by Greengear; May 2, 2023 at 11:27 PM.
Reply
Old May 3, 2023 | 03:38 AM
  #22  
4-vettes's Avatar
4-vettes
Race Director
15 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Nov 2006
Posts: 13,193
Likes: 7,793
From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
2022 C3 of the Year Finalist - Modified
Cruise-In VIII Veteran
Default

WOW! THOSE ARE OLD!! I haven't seen tire sizes like that in years! Your really taking your life in your own hands driving more than 1 foot on those.
most of us you will find run 255/60-15's.
Which are very close to the optional size used 78 and up.
Reply
Old May 3, 2023 | 03:43 AM
  #23  
4-vettes's Avatar
4-vettes
Race Director
15 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Nov 2006
Posts: 13,193
Likes: 7,793
From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
2022 C3 of the Year Finalist - Modified
Cruise-In VIII Veteran
Default




[/QUOTE]
And looking at these 2 photos, is your car on jackstands??? Sorta doesn't give us a good idea how they look.
Reply
Old May 3, 2023 | 05:47 AM
  #24  
Greengear's Avatar
Greengear
Thread Starter
Racer
 
Joined: Aug 2018
Posts: 266
Likes: 52
Default

Originally Posted by 4-vettes
And looking at these 2 photos, is your car on jackstands??? Sorta doesn't give us a good idea how they look.
Yes it is on jack stands. I drove about 5 blocks at slow speed just to show my friends and all agreed to stick with the staggered. Too bad the white letter tires are so much more I think I'll get the cheaper tires without. white letters.
The pic shows how the corvette logo on the back is missing so I will order that with the tires.
Reply
Old May 3, 2023 | 06:15 AM
  #25  
4-vettes's Avatar
4-vettes
Race Director
15 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Nov 2006
Posts: 13,193
Likes: 7,793
From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
2022 C3 of the Year Finalist - Modified
Cruise-In VIII Veteran
Default


Here's one with 255/60-15's all the way around. See how they fill in the wheel wells?
And places that sell tires don't sell Corvette emblems.
Reply
Old May 3, 2023 | 10:38 PM
  #26  
Greengear's Avatar
Greengear
Thread Starter
Racer
 
Joined: Aug 2018
Posts: 266
Likes: 52
Default

Shocks were shot. One bolt was broken and one shock hanging out of bottom of a arm.


Reply
Old May 5, 2023 | 08:27 PM
  #27  
Greengear's Avatar
Greengear
Thread Starter
Racer
 
Joined: Aug 2018
Posts: 266
Likes: 52
Default

Rag joint replaced,
got the corvette logo on the back,
Fixed the p/s return line with a piece of hose instead of buying the whole assembly. I’ve gotten so many junk quality parts over the past few years I find myself rebuilding parts more/ buying more used oem parts.







Reply
Old May 5, 2023 | 11:36 PM
  #28  
carriljc's Avatar
carriljc
Le Mans Master
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2001
Posts: 6,723
Likes: 1,377
Default

Greengear
I concur that H60-15 is 245/60-15 per this website cross-referencing: https://www.turbinecar.com/tires.htm

I recommend Performance Plus Tire in Long Beach.....if I understand correctly you're somewhere in/near L.A.? You can get V-rated 15s there for a good price.
They sell v-rated 15s in both the sizes you want.
225/60R-15
https://www.performanceplustire.com/...:ts:225-60-15/
and
245/60R-15
https://www.performanceplustire.com/...e:ts:24560-15/

Good prices and well worth the drive if you are in L.A. I run the vitour galaxys at all 4 corners in 235/60R15 in my 68. 235s is about the largest I could squish in the front so that's why.


.

Last edited by carriljc; May 5, 2023 at 11:56 PM.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-1

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-2

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-3

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-4

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-5

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-6

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-7

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-8

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-9

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
Old May 14, 2023 | 05:20 AM
  #29  
Greengear's Avatar
Greengear
Thread Starter
Racer
 
Joined: Aug 2018
Posts: 266
Likes: 52
Default

Last few free days Ive been playing with the A/C system. The VIR is really interesting and unusual, access to it is extremely difficult. When I bought the car the compressor was not installed. After finding the right belt and removing and reinstalling the VIR to replace a hose that goes to it I did a short test drive with A/C today so there is hope. Since finding leaks can be challenging I anticipate finding more leaks after I fix the big leaks. The pressure switch is definitely leaking with all the frost that formed.
Also the plastic vents under the dash are missing. I will probably install a VIR eliminator kit as many people have described on the forum.
Ive been driving a few times a week, Connected the air pump in prep for a smog test.



Reply
Old May 18, 2023 | 09:17 AM
  #30  
Greengear's Avatar
Greengear
Thread Starter
Racer
 
Joined: Aug 2018
Posts: 266
Likes: 52
Default

Decided I don’t like the 80’ style bumper cover on my 76’
bought this urethane bumper cover that I will paint.


Reply
Old May 19, 2023 | 07:42 AM
  #31  
augiedoggy's Avatar
augiedoggy
Le Mans Master
15 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2007
Posts: 5,019
Likes: 1,119
From: North tonawanda NY
Default

If you werent so far away id be interested in your old aftermarket bumper for my 74... The 80s factory bumpers all had the ugly 5mph crash bumperettes as far as I know.
Reply
Old May 19, 2023 | 08:26 AM
  #32  
Jebbysan's Avatar
Jebbysan
Dr. Detroit
Supporting Member
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
Default

Are you going to lower the front end?
Those Convo-Pros look amazing all polished up.......somebody will want those as they are making a bit of a cult comeback.......one thing about them is that they are very light.

Jebby
Reply
Old May 19, 2023 | 10:17 AM
  #33  
Greengear's Avatar
Greengear
Thread Starter
Racer
 
Joined: Aug 2018
Posts: 266
Likes: 52
Default

Originally Posted by Jebbysan
Are you going to lower the front end?
Those Convo-Pros look amazing all polished up.......somebody will want those as they are making a bit of a cult comeback.......one thing about them is that they are very light.

Jebby
I noticed how light the vintage centerlines are while moving the rims around. They seem to be most sought after when sized for vintage land cruisers. Any forum member in SF Bay Area , I’m willing to part with them cheap. Otherwise I’ll throw them on eBay. Same goes for the dove tail rear bumper cover.
Reply
Old May 20, 2023 | 10:54 PM
  #34  
Greengear's Avatar
Greengear
Thread Starter
Racer
 
Joined: Aug 2018
Posts: 266
Likes: 52
Default

Bumper cover install didn’t go as well as I had hoped.
I used duplicolor and did not clear coat it.
the top corners of bumper cover don’t match up very well and the color match isn’t very good.
The rest of the car is painted poorly so I didn’t want to go to a paint shop for the bumper cover paint.
That said I’ll leave it as is and move on to other projects instead of switching back to the 80’ style rear.
I know fairing could be used to match the oem cover to the body and a better paint job would improve the look but I’m planning to park on the street and drive this car normally, not cover it like my other classics which I babied and kept scratch free.
I think I’ll spend some time on the alignment rack and get the trailing arm shims sorted out next. I set the front toe last week and that helped a lot.




Reply
Old May 21, 2023 | 07:25 AM
  #35  
Jebbysan's Avatar
Jebbysan
Dr. Detroit
Supporting Member
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
Default

Shoot some clear on it and it will change hue....
close enough for government work.....
I agree....the original style cover looks better....

Jebby
Reply
Old May 21, 2023 | 11:04 PM
  #36  
Greengear's Avatar
Greengear
Thread Starter
Racer
 
Joined: Aug 2018
Posts: 266
Likes: 52
Default

Quick and dirty wheel center and inside spokes repaint. I hit the

bumper-ets too.
I used some plastic plant pots I found lying in my wife’s garden stuff as a mask for wheel centers and taped the front of spoke holes and painted from the back. I used Oreilleys flat black engine paint.
it was a bit disappointing to realize I have a mix match set of stock wheels. I actually got 5 wheels when I bought them on Craigslist. Looks like 2 of one type 3 of another. I only noticed because I needed two different plant pots to mask centers.
when I get into the shop with alignment rack I’ll switch one tire so that I have one style rim on the front and another on the back. I think all the wheels are factory wheels probably just different production years.






Reply
Old May 22, 2023 | 10:21 AM
  #37  
BKbroiler's Avatar
BKbroiler
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2002
Posts: 5,086
Likes: 786
From: Lebanon Township New Jersey
Default

Good to see that you painted the "bumperettes" black.
The fit of your stock replacement bumper cover isn't too bad. The originals weren't much better.
Reply

Get notified of new replies

To Summer project 76' vette

Old Jun 1, 2023 | 10:46 PM
  #38  
Greengear's Avatar
Greengear
Thread Starter
Racer
 
Joined: Aug 2018
Posts: 266
Likes: 52
Default

The previous owner replaced one side trailing arm bushing but never aligned it. Rear Toe is way off. Ahhhh the shims and that bolt!!!
I'm about halfway done going back to it tomorrow.




Reply
Old Jun 2, 2023 | 11:45 PM
  #39  
Greengear's Avatar
Greengear
Thread Starter
Racer
 
Joined: Aug 2018
Posts: 266
Likes: 52
Default

More battling the trailing arm
shims. I keep moving shims but not hitting the speciation. At least both side bolts and shims are free and movable now. I think I will order a shim kit. I think I need some different thinner shims to hit the spec. One side had new bushings and was a bit mangled. The other side had probably not been disturbed since 1976. The ancient side still came apart relatively peacefully. I used vice grips and a pry bar to yank the shims.





Last edited by Greengear; Jun 6, 2023 at 10:24 PM.
Reply
Old Jun 6, 2023 | 10:23 PM
  #40  
Greengear's Avatar
Greengear
Thread Starter
Racer
 
Joined: Aug 2018
Posts: 266
Likes: 52
Default

Got both power windows working and lock on drivers side functioning.
there was a new regulator and inner latch on the drivers side but the rod for lock was missing. made a lock rod that isn’t adjustable and added a door actuator to be connected to something later while in there. I think I’ll do driver only power lock.
With locks and windows working and all the other crap I fixed I was ready for a daily driver or at least a drive to work test. I did a few stops in the dense city and did freeway and stop and go urban traffic.
All good it didn’t smell hot or overheat. Engine was quiet at idle. The 350/th350 combo and total stock everything made it actually pretty comfortable in stop and go traffic. It wasn’t hot weather so that helped everything.






Reply



All times are GMT -4. The time now is 03:09 AM.

story-0
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-1
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-2
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-3
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-4
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-5
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-6
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-7
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-8
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-9
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE