Sam... I`ve installed QA1 rear 12-way adjustable shocks,
Hotchkis rear lowering springs,
adjustable rear spring spacer (sits under the spring on the perch), adjusts from 0 to 4", it can be used to preload right rear tire or lift both sides, adjusts in seconds with a socket set,
Hotchkis rear sway bar,
edelbrock double adjustable rear upper control arms,
edelbrock boxed rear lower control arms,
edelbrock tubular rear braces (for strength and to accurately locate rear suspension).
The rear end is from a 70 chevelle, with a 4.11 posi, added moser c-clip axles with 1/2" wheel studs.