I think he is looking for something cheap and easy. Sounds like you have done most everything. Maybe new plugs and wires. Won't really improve performance other than smoothing out the idle, etc. But if you are just looking for something to do to improve your car and keep you occupied, then that would work. I hear ngk v-power plugs with Napa belden blue wires are a good combo. Just an idea. Shouldn't be more than $50 or so.

 

throw on new suspension. if anything just the shocks and seats. you'll probably be suprised at the difference in the ride.