What engine does it have? That will make a big difference in how much it will take to make it "faster". I believe that the 85 SE was powered mostly with the LB8 V6. Not a real powerhouse of an engine but adequate. Doing things to it would not get you where I think you want to go. If it has the 5 liter GM engine of the same vintage, the options are much better. Is it fuel injected or does it have throttle body injection?
Anyway, the best, and least expensive things, you can do to assess its power needs would be to get it running after changing all fluids like oil (and filter), trans fluid, coolant, PS fluid, and rear end lubrication. Check the air filter and replace it if it appears clogged. Things like spark plugs, ignition wires, dist cap, etc. will depend on how well it starts up and runs. Then you can go into serpentine belt condition, brake fluid, clutch oil (if its a manual trans), front end lubrication, tire condition and pressure, and battery condition.
After that, you can address other stuff like seats, radio, paint, wheels, and, oh yeah, blowers and air intake systems. Got the picture yet? This car will take a long time and many $$$ to get you where you want it to be. Good luck if you have the time and money.
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