Performance lacking any options

I have a 1990 Riveria 3800 series1. My first car and i love except its too slow. Now I dont want to be running 14's but i would lioke to have a little bit more peroformance. I've already made a custom cold air intake, and i have a straight pipe from the cats back she really purrs. I was thinking about getting a superchip but beyond that i have no ideas. Is there anyway to use series 2 performance parts on a series 1. For example say an upgraded throttle body from a like a 97 pontiac 3800. Any ideas would be greatly appreciated.