There was a similar thread about how much money is invested in ur ride, but i dont know where it went.
Its a Caprice so its not easy to find preformance stuff to do to it. I have a niice stereo in there. All I have done to my car preformance wise is some exhaust work, and I got a K&N Airflow kit thingy on there. Its not the right one for my car cause I couldnt find one for a caprice, but I was able to modify it a bit, and it works good. Oh ya and new platium spark plugs and new wires.
Currently saving up for some new rubber, and im putting in a set of gauges for oil press, water press, and voltage this weekend.