I think you would be best looking for a 70-74 corporate 10 bolt out of a nova. You can adapt that rear end to almost anything.
5 x 4.75 camaro/ nova
5 x 5 impala / 5 lug truck (re-drill axles)
6 x 5.5 6 lug truck (re-drill axles)
A lot of the nova's came with 2.73 gears.
My .02
gwarren007
