1987 Carrier Bearing Slip Joint Yoke Question.

[Thewagoooon]

I have a 1987 R30 Chevy Crew Cab 2 wheel drive that I want to replace the center slip joint yoke. The one that goes into the carrier bearing. Are they all the same size? No matter what trans was in it? Anybody know where I could get one? I'm having trouble finding any information. The truck originally came with a turbo 400. Again, this would be the Yoke in the center of the two piece driveshaft. Thanks in advance