Originally Posted by lakeroadster
The '63 frame is a good one. The trailing arm rear suspension was kept untill 1973 and was the basis for todays current NASCAR "truck arm" suspensions. In regards to the front end you can swap in a newer crossmember, or just upgrade your existing suspension with kits from someplace like CPP.
I sure wouldn't swap in a newer complete frame... that pretty much doubles the required skill level of the builder.
I think I looked at a '63 truck when I was debating a new cab. (The cab was wrong anyway)
IIRC, though, the frame was flat, and didn't have the "kick" where the front cross-member bolts up. Here's a pic of my 66 GMC frame, so you can see what I mean.
The newer (1976) cross-member was all but a "bolt-in" swap, (see my journal) but the stance is just a bit wider.
I *still* don't have it on the road yet, but I'm hoping it will be fine.