C3 Frame for all ages

[Calvin C.]

I have been told that all c3 frames are the same and I can use anyone. Is this true?
I am working on several corvette projects. My 1973 convertible BB, has some front frame damage so I have been keeping my eye out for a frame as a possibility. I thought I needed a 1973 frame since it was a unique year.
thanks
cal

[Chuck R.]

Re: C3 Frame for all ages

Regarding the front frame section, I'll venture that your safe from 68 to 82

Chuck

[Howell Jaynes]

Re: C3 Frame for all ages

Go to corvettefaq.com and click on the "Suspension." button. Under selection of articles open up "C2/C3 Frame History." This will detail all of the evolutionary changes made from the frame starting in 1963 up to 1982.

[Robert E.]

Re: C3 Frame for all ages

Cal, Remember 4 speed frames do not have removable transmission cross members, as automatics do.

Robert
41801

[M & K Perkins]

Re: C3 Frame for all ages

Here's the info from that site so someone can find this in the archives if the site goes down someday

1963 Frame intro

1964 Body mt brackets changed & gussets added to kick up area

1965 Indent added to xmember due to larger engine pulley - slot added for side exhaust mounting

1968 Rear xmember changed - height & location of body mounts changed - extra gussets added to rear kick up area

1973 Body mounts lowered to accomodate thicker bushings

1975 Provisions for energy absorbing bumber shocks added

1976 Left side exhaust mount on transmission xmember deleted

1978 Gas tank xmember changed - Rear xmember changed to accomodate new rear styling and gas tank location

IN GENERAL

1968-1982 Automatics has removable xmembers & the Manual Transmission Vettes had welded xmembers. The exceptions would be the 80-81 in which they were all removable

Hope this helps

M&K

[Michael W.]

This list is not complete

or accurate.

It is true that a '73 frame is unique, but earlier or later frames can be modified to suit (been there, done that).

Mike

[Calvin C.]

Re: This list is not complete

Are the modifications exstensive.
cal