Skraps, if camaro/firebird rears are scarce the mid size GM's (cutlass, chevelle, etc.) had rear ends in the 61" wide range. Just be sure to have full tanks on your cutting rig and a new grinding wheel to trim all the coil springs mounts, torque arm mounts, etc., etc., off these housings plus you'll have to weld on spring perches. The saving grace is they're dirt cheap and have a wide selection of ratios.
