Hi
The body should bolt up fine.Maybe some minor differences.
You may have to change the wiring harness,depending on the power train in the 1/2 ton.Still not a real big job compared to welding and body work to fix a rotted out cab.
90 Chev 3500 c/c 4x4,6.2na,400 auto,4:10 gears.DSG Timing gears,main girdle, isspro tach, pyro,boost,oil and trany temp.Dual Tstats, High volume peninsular pump,on shelf, Custom turbo and intercooler 85%complete. Change of plans for the dually, it's going to get a Cummins. Both trucks are Blue 90 4x4 crews