wll an 80s truck 4 spd tranny fit an a body?

well i was told that the truck units were more used in b bodes but im not sure im still working on my truck project as of right now and hunting for a duster unless anybody can find me a good road runner project for a good price. but i love cudas and challengers but i believe ppl watch too much barret jackson and want 21 grand for a roller lol but again and a always im new so any and all help will be helpful and appricated