The rear lift was the easiest ever. The '66-'73 J-trucks (and some other FSJs) have tension post-mount shackles, so we flipped them. By unbolting the shocks and drooping the suspension you can use a large prybar to flip the shackle around and down for about 3 inches of lift. It made the truck sit level, it's inexpensive (free), and easy. The pinion angle is a little off but not bad enough to do anything about it just yet.