Brake rotors plus other items for a 75 Valiant

The dodge diplomats & 85 & under dodge vans & trucks use the same rotor & calipers

Will the Diplomats and Vans have the same master cylinder booster mounting brackets with plunger that I need?
To convert to boosted vs manual brakes the 1975 PCD service manual shows a booster mounting bracket, this must be a Pick N Pull item and I hope a popular item i'm under a time limit not wanting to repace with a manual master cylinder. Calipers are like new inside flawless pistons so just a seal kit. Once done i'll be 100% new with the brakes.
I located the gasoline smell, fuel tank is shot at the seams hence a replacement, Rockauto.com has one at $158 best price so far.
Thanks for the reply.