I see we have similar taste in cars. Mine is an 85.
Keep the mods to a minimum for a year. Learn the car and how to drive it. Take it to the track (where this photo was taken) and see what it can do in a relatavily safe environment.
When you are ready for mods start with the bolt-ons (InterCooler, Turbo, ...) and work towards insanity from there. If you ever drop the engine, you will eventually spend more on upgrades than you spent to buy the car. But once you are truely hooked on these cars there is not much choice.
You will soon be an addict. There is no 12 step program for this one. If you care about keeping your wife and/or your banker happy then sell the car now before you drive it. If not, welcome to the club. Just keep telling yourself it is cheaper than a needle.