You've mentioned rear coil overs twice, but I'm going to assume you're talking about booster or overload shocks and not true coil over shocks. In my opinion, they are a cheap band aid fix at best and put undue strain on your upper shock mounts that they weren't designed to take. Your best money would be spent on getting a good set of leaf springs under the car that set it at whatever ride height you want. You can order stock, +1", +2" etc. There are dozens of threads here talking about different brands and number of leafs, I'll let you look them up. Once you get a decent spring under the back, you may not feel the need for a rear sway bar.
