Welcome to CHR! You already have a good start on your Sedan, you registered here! Great bunch of guys with like 15 gazillion combined years of experience, and probably nothing you could ask about building a Hot Rod that someone one here won't come back with a "been there, done that" learning experience and how they worked through it.

The old Chevy frames aren't the best in the world, but with proper reinforcement and some good suspension they work great--as for the small pickup frame, as Mike, Mike and Roger said it can be done but by the time you're done you've got as much time and effort making it fit as you would in a brand new set of rails or building with what you have. Whichever way you decide to go on the chassis remember the first rule.....keep the process of building it fun!!!!!