Are all C3 frames the same? - Corvette Forum

Go Back   Corvette Forum > C3 Corvettes, 1968 - 1982 > C3 Tech/Performance
Log In 
Register FAQ Search Today's Posts Mark Forums Read Vendor Directory

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
1982CorvetteDude's Avatar
Member Since: Jun 2005
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
Posts: 6,198
Location: San Diego CA
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
Posts: 6,628
Location: Finger Lakes NY
Thanked 3 Times in 3 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
Posts: 3,025
Location: Noblesville Indiana
Thanks: 0
Thanked 5 Times in 5 Posts

This may help...
joewill is offline   Reply With Quote
Go Back   Corvette Forum > C3 Corvettes, 1968 - 1982 > C3 Tech/Performance
Reload this Page Are all C3 frames the same?

Similar Threads
Thread Thread Starter Forum Replies Last Post
looking for a 1973 corvette automatic frame cooter69 C3 Parts for Sale/Wanted 14 03-02-2016 03:08 PM
69 frame rvzio C3 General 3 12-22-2013 09:12 PM
Frame differences, 1969 vs. 1974? ChrisMiami C3 General 22 09-10-2013 05:44 PM
68,69,70 Front Bumper Part Interchangeability 68/70Vette C3 Tech/Performance 6 04-29-2008 05:22 PM
Manual Frame vs Auto Frame basketcase69 C3 Tech/Performance 3 03-01-2005 10:33 AM

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

All times are GMT -4. The time now is 05:38 AM.