[Mike C]

Best bet would be same vintage, same transmission and t-case. Different transmissions and different transfers can make for different shafts. '73 and up trucks have more wheelbase and different location for the motor relatively speaking. I would consider having one made. A brand new CV style shaft runs about $300 balanced.

I just had to have one made for my '86 K30. Truck was originally an SM465/205 with a slip yoke on a one piece rear shaft. The replacement SM465/205 that came from an 80's Suburban required a two piece shaft with carrier bearing which was no surprise, but the front driveshaft was now 5" too long.

New shaft was $310 delivered from Wenco. This is the second shaft I have bought from them. First was a custom one for a Nissan Borg Warner T5 in my 240Z with a 1310 joint on the rear companion flange. Nice people to work with.