Frame

[Laz]

I've got a 66 stepside I'm wanting to do a bottom-up rebuild on, but my father says he thinks the frame of the truck is bent. He's thinking we should get the frame off of a late 70s/early 80s stepside and use that since it will be a sturdier frame, already have the leafs, etc etc...

I'm pretty new to this whole thing, I've only ever actually done minor engine work, so I'm pretty ignorant when it comes to this.

Anybody know, by chance, if retrofitting a frame like my father's considering under the body if the 66 is an easy swap, or is there lots of customization to the frame that would need to be done? Would looking for a better off frame from 60-66 be a better option? (Small town, unfortunately, so not likely to find anything anyway)

Thanks