Rear suspension recommendations.....

While you have it apart, don't forget to add Dr Diff 1/2" spring inboard relocation package for maximum rear tire without mini-tubbing. Also, rebuild the 40 year old rear brakes and replace the rubber brake hose.

New RUBBER bushed leaf springs (pick your height, A-BodyJoes look great for a driver / stock height), 3/4" solid rear anti-sway assembly, Qa1 adjustable shocks and you are good without busting the bank. No cutting or welding on the car, just the relocating the spring perches on the differential housing. You will likely have the rear out of the car to paint / powder-coat it during the upgrades regardless.

Remember to factor tire size / diameter when deciding on how much spring arch you want.

FYI....I have a almost new set of ESPO +1" in storage.....took them off the gold Duster and replaced with stock height. They are available.

FYI 2.0....currently fabricating / laser cutting bracket for small block P/S compact pump form the Butch Leal street Flash. Be a good add for your front power rack and pinion.
Sandin A/C and compact P/S pump brackets