Found an 86 square body donor for crossmember swap

[bigmoe]

Okay I found an 86 square body 1/2 ton donor for my 65. It’s a 305 truck. I want to use the front crossmember and all the steering brakes etc. The motor mounts. Probably the steering column if it has tilt. I’m wanting 5 bolt and will convert the rear. I’ll rebuild everything and add drop spindles. I’ll buy new rotors. I understand they came in different thicknesses? The thicker is better? I can convert to whatever thickness I want as long as I buy the drop spindles for the matching thickness?