1975 B body disc to A body?

As the title suggests, I have a parts car, with a disc setup on it (75 RR). Is this a bolt on to A bodies? I swapped a 74 disc kit from an E body onto a 74 dart is the past, but unsure if the late 75 B is the same, or if the 75 setup is of any use to anyone. Thanks!!!
Author: Johnny Mac