There was a different frame used on the 60-62 models versus the 63-66. The rear ends were different between the two models also, as were the shock mounting location, spring locations and the trailing arms mounting locations. In the research Ive done, the rear springs from 60-72 are interchangeable. The front end of the 60-62 used torsion bars, so no springs there.

Last edited by jon1963; 04/02/2012 7:32 PM.

http://s971.photobucket.com/albums/ae197/jon63c10
1963 c-10 shortbed stepside 427 BBC T16 HD 3 speed
1963 c-10 shortbed fleetside 348 "w" 1st gen big block & powerglide