MrJuanderful,
The Chevy 70s-80s fullsize truck frames will have the steering on the outside.
(Borgeson!) Placement of the engine to the radiator can be an issue and crossmembers, brake master will need to be considered.
We used a shortbed Chevy truck frame for the wheelbase, it's 1 inch longer and 4x4 was the direction we wanted. It's the width that may cause you a problem, I've read that the fenders off a Bigbolt are wider, so that might help.
& a Mechanical Engineer chiming in..
good luck on your project.
