8 3/4" rear question

Also Moser Engineering sells a 4.5 Bolt pattern axle set for A-body 8 3/4 Rearends. And for larger width brake drums.
A30-CST-A45 - A-Body, 8 3/4" Rear Axle Shafts, Stock A-Body Drum Brake (Redrilled) -- 30 (Pair) - Moser Engineering