Crewsin in my 63 GMC Crew Cab

[jonzcustomshop]

great shots so far, I would use this new cab, just be on the look out for a cheap lwb for frame (maybe) a good box.
what they did to your crew at the coach build plant, was add a section to the center of the cab, and cut down a long fleet box.

I think what I would do is use the roof , rear doors, and center pillars from your crew, and then graft that onto this cab you just got.

use the original crew box as a pattern on where and how to cut down your new box.

figure out the direction of your build first, full resto 4X4? 1 ton 2wd flat bed? 1/2 ton 2wd ?
that will help in your choice for donar trucks.

remember these were custom built from a single cab truck, and you have all the parts you need to custom build it again, (onto another cab) yourself.