Are all C3 frames the same? - CorvetteForum - Chevrolet Corvette Forum Discussion

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

Are all C3 frames the same?

Thread Tools Search this Thread
Old 01-20-2010, 09:24 PM   #1
CF Senior Member
Thread Starter
1982CorvetteDude's Avatar
Member Since: Jun 2005
Location: Arkansas
Posts: 2,932
Thanks: 0
Thanked 0 Times in 0 Posts
Default Are all C3 frames the same?

I know this comes up a lot, I think they are close but not exact enough to allow someone to bolt a 69 body to a 82 frame without doing some serious modifications to be able to utilize the 69 bumpers and drivetrain.

I sparked a slight debate, and if I'm wrong please correct me....but some people seem to think the differences aren't enough to make a difference in which frame you choose. I beg to differ...this is some difference across the years.
1982CorvetteDude is offline   Reply With Quote
Old 01-20-2010, 09:38 PM   #2
CF Senior Member
Goody's Avatar
Member Since: Oct 2000
Location: San Diego CA
Posts: 6,198
Thanks: 0
Thanked 0 Times in 0 Posts

Just the difference in the way the rear differentials are mounted is one major difference.

Auto and Manual tranny's go in entirely different as well.

I don't have those 2 exhaust pipe holes that you see on the older cars.

And I suspect some of the holes in the frame sections will not line up (bumper bars and such).

The basic frame itself is much the same but that ain't all there is to it though.
Goody is offline   Reply With Quote
Old 01-20-2010, 09:58 PM   #3
CF Senior Member
champs65's Avatar
Member Since: Jan 2006
Location: Finger Lakes NY
Posts: 7,220
Thanked 11 Times in 10 Posts

There are some differences, but nothing you can't work around. If you wanted to put a 69 body on an 82 frame (or any from 75 and up), you would have to graft your old 69 rails past the rearend to your newer frame. I'm sure some tweaking is needed up at the front of the frame too, but I don't know if you could work with the 82s' front frame extension or not.

Transmission should be able to swap automatics and standards w/o any problem. the older manual frames had a welded crossmember, automatics unbolted. You'd just need to weld a pivot stud on the frame for your clutch. I think at some point (75?) all cars got the removeable crossmember. They all had 2 exhaust holes up to 82.

Basically all the way back to 63 the frames are similar...body mounts did move between C2 and C3 generations, e-brake brackets did change, kickups were strengthened, the very fronts and rear are different throughout the years, and the rear frame sections of midyears have a distinct downturn to them as they meet the bumpers.
champs65 is offline   Reply With Quote
Old 01-20-2010, 10:29 PM   #4
CF Senior Member
joewill's Avatar
Member Since: Sep 2007
Location: Indy Indiana
Posts: 3,320
Thanks: 0
Thanked 38 Times in 35 Posts

joewill is offline   Reply With Quote
Go Back   CorvetteForum - Chevrolet Corvette Forum Discussion >
Reload this Page
  • Are all C3 frames the same?

    Related Topics
    Thread Thread Starter Forum Replies Last Post
    rvzio 69 restore rvzio C3 General 4575 Yesterday 06:42 PM
    65 vs 69 Frame Differances Mr D. C1 & C2 Corvettes 12 05-08-2016 11:04 PM
    looking for a 1973 corvette automatic frame cooter69 C3 Parts for Sale/Wanted 14 03-02-2016 03:08 PM
    68 Frame differances 530planeman C3 General 11 11-27-2015 12:27 PM
    Frame changes, automatic to manual + corvettecris C3 Tech/Performance 3 02-02-2005 02:26 PM

    c3, corvette, difference, differences, frame, frames

    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 03:36 PM.

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