Rears for my 2wd 78

[1slo_camaro]

Welp ive been in the Jeep and Camaro game for quite a while and welp the axles are the first thing i try and beef up to handle either more power or taller tires...... now with my truck i really want posi and some 3.73s...... and the dreaded drum brakes. but from what ive been looking at and reading im kinda stuck with them until i want to re-do the entire brake system.

What axle can i swap in for a stock posi unit? or anything? or do most budget builds keep the stock axle and build it? will any other vehicles swap in? will a 4wd axle work?


2wd 73-87 trucks are kinda scarce in my area in the junkyards and when they go in theyre ripped apart pretty quick. so i am trying to figure out how i can get an axle and clean it up real nice and get all the work done prior to install...... can yall help me?