Originally Posted by JeffL
The best way to fix that, put it on a frame machine & give it a pull.
Although you wont find any frame specs for anything that old, someone who is good with full frame vehicles should be able to pull it & get it within specs.

Sounds like that truck was hit square on the end of one of the frame rails.

You might find measurements in this GM Vehicle Information Pack for 1965 Chevrolet


1946 GMC Pickup - S-10 Frame, 455 Buick, TH400, original patina.

My 46 GMC on Photobucket