Axles and wheels

The axles for an A-body 8 3/4" have to have the bearing location machined like for B/E body 10x2 brakes along with the 4.5" bolt pattern and larger register. The length stays A-body size. Telling the axle manufacturer what parts you are using will help them get it right.

I just don't know if truck 10x2 brakes are the same as car 10x2 brakes.

I believe '73-'75 A-bodies kept the 4" bolt pattern if they had drum brakes all around which were 9" (I think?). The disc option gave them 4.5" bolt pattern and 10x2s.

Oops! ....meant 10x2.5"