12 bolt rears were only used thru 1972 except in trucks and bearing sizes of those are different so carriers likely won't swap. Later model Camaros were 10 bolt and didn't have upper control arms so the housings won't swap.
Rear end swaps are not that difficult...if you have the correct housing and control arms.
I've never had a super high performance engine,and I've never thrown a rear end.
Most of my cars usually have about 400 Hp,and I drive them hard,but don't abuse them.
If you don't over power them and drive smartly,they rarely give you trouble.
The only time you need to spend top dollar,is when pushing the horsepower.
There are plenty of good used rear ends available..you just need to look.