im buying a 87 non turbo and i want to know of any good mods for track days. im turning it into a full racecar but budget.

go with force induction! dump the NA engine and put in a complete turbo engine. If you're planning on running NA then it would be a long journey.

IR

True that. You should definately hook up your supra with mild suspension first. Sways, coils, etc. Those supras are heavy so you wont be able to turn that mother without a good set up. Kill em through the corners!