The early 60's Chevy trucks had torsion bar suspension that would be a real PITA to adapt. I believe you would be far better off to find a crossmember or a front frame clip from a truck about the same width as yours with coil spring suspension to use as a donor. The radiator core support and front frame horns from yours could be adapted for stock-appearing sheet metal mount points once the suspension change is made, if you choose to do a front clip installation. The advantage of doing the entire frame section graft is that it retains the original steering geometry, and usually the steering gear, also.
Jerry
Last edited by Hotrod Lincoln; 09/24/2010 12:51 PM.