c3 frame compatibility
Thread Starter
Instructor
Joined: Aug 2005
Posts: 114
Likes: 0
From: St. George Ontario, Canada
c3 frame compatibility
Can someone point me toward a compatibility matrix for C3 frames?
Ie. which frames work for which years? We run a little corvette club out of paris ontario, and have been collecting parts for a while now.
We have a 73 frame, and a 75 frame in our possession, and a 74, 79, and 80 that are all on the road, but are in need of frame off restorations this winter.
Will any of these frames work under the 74, the 79, or the 80?
Thanks for having a look!
Ie. which frames work for which years? We run a little corvette club out of paris ontario, and have been collecting parts for a while now.
We have a 73 frame, and a 75 frame in our possession, and a 74, 79, and 80 that are all on the road, but are in need of frame off restorations this winter.
Will any of these frames work under the 74, the 79, or the 80?
Thanks for having a look!
Instructor
Joined: Feb 2004
Posts: 241
Likes: 0
From: Ravenna Ohio
http://www.71corvette.com/frames.html
i'm stoked i was the first one to help with this answer i think it will have everything your looking for.
"YES"(Best Napoleon Dynamite Voice)
i'm stoked i was the first one to help with this answer i think it will have everything your looking for.
"YES"(Best Napoleon Dynamite Voice)
Last edited by JDRez42; Dec 6, 2005 at 06:50 PM.
Thread Starter
Instructor
Joined: Aug 2005
Posts: 114
Likes: 0
From: St. George Ontario, Canada
Originally Posted by JDRez42
http://www.71corvette.com/frames.html
i'm stoked i was the first one to help with this answer i think it will have everything your looking for.
"YES"(Best Napoleon Dynamite Voice)
i'm stoked i was the first one to help with this answer i think it will have everything your looking for.
"YES"(Best Napoleon Dynamite Voice)
Nice work.
Melting Slicks
Joined: Dec 2000
Posts: 2,635
Likes: 0
From: Union Ontario
The frame changed between 77-78 so the 75 frame won't directly fit the 79..... but it only involves drilling 2 holes in the rear crossmember for gas tank straps. I would think the 75 frame would directly fit under the 74.
The frame again changed in 80 for the new rear end the mod's required would be more significant to put one of those frames under the 80
I'm not exactly sure what happened when they went from chrome to rubber bumpers.
The frame again changed in 80 for the new rear end the mod's required would be more significant to put one of those frames under the 80
I'm not exactly sure what happened when they went from chrome to rubber bumpers.
Melting Slicks
Joined: Oct 2002
Posts: 2,865
Likes: 1
From: I may be getting old but I refuse to grow up
Originally Posted by MikeC
I would think the 75 frame would directly fit under the 74.
I'm not exactly sure what happened when they went from chrome to rubber bumpers.
I'm not exactly sure what happened when they went from chrome to rubber bumpers.
Stp
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
Instructor
Joined: Dec 2004
Posts: 236
Likes: 0
From: Clearwater Florida
Frames
I have 73, 74, 76, and 80 frame (or pieces of them) in the garage right now.
Talking about the rear section of side rails of the frame where the rear bumper mounts.
68-73 is the same.
74 is a modified 73. A 74 rear frame section will work on an earlier car with fairly simple modifications. Suffice it to say, the 74 frame side rails have the same cross section as 68-73 side rails but it is not identical due to the bumper mounting.
The 75-79 frame side rails have a rectangular cross section where they attach to the rear crossmember.
The 80-up frame side rails have a square cross section where they attach to the rear cross member.
Talking about the rear section of side rails of the frame where the rear bumper mounts.
68-73 is the same.
74 is a modified 73. A 74 rear frame section will work on an earlier car with fairly simple modifications. Suffice it to say, the 74 frame side rails have the same cross section as 68-73 side rails but it is not identical due to the bumper mounting.
The 75-79 frame side rails have a rectangular cross section where they attach to the rear crossmember.
The 80-up frame side rails have a square cross section where they attach to the rear cross member.
