Texmextukin
+1y
Best bet would be all four independent with a wishbone 3-link setup, if you want to keep your stock tank. Or run a forward triangulated four link with a fuel cell or blazer tank in between the rear frame rails. At least 5 gallons of air and a good compressor. bigger bags help with a better ride too(2600).
As for wheels you can lay an 18 with a good size tire(225/40) with some modifications to your inner fenderwells. 20's take alot more work, but you can still keep a/c. you just have to modify the blower box, along with tubbing your firewall and gettin smaller dimeter brake booster. You also have to dehump your lowers and pie-cut uppers, or just get tubular control arms.