Spam-BTEG

Im a new forum guy here.. Im a few months shy of purchasing a 1984 Nissan 300ZX I really cant find much info on the car except that it's a classic.. or so I think. That and the car is an 'as-is' car which has never been checked out.. and I dont know what problems may already be wrong with the car ( Like how some cars have faulty parts already in it..or a reccomended upgrade to prevent future problems ) I feel like taking the car, stripping the paint off and giving it say.. midnight blue or black, Gonna rip the stereo out and put in a CD-R player with mp3 capabilities with a nice sub in the back I dont really expect the car to be fast.. But any car at this point to replace my.. Dodge pos hello-I-get-50-miles-on-one-tank-of-gas RAM truck Hopefully the gas mileage will be much better.. if not I'll see if I can somehow fix it so it is better. Any feedback would be great on upgrades or possible repairs.. I want my first bought car to last me.. oh, as long as possible!