Get yourself a Z. Tune it up. It's light already, don't worry about it, just give it few extra horses. It will make you happy.
The Datsun 240Z was a global effort. The Europeans gave the recipe, the Japanese came up with a very good product and the Americans bought them up like there was no tomorrow for Datsun (which was sort of true). Thanks to this combo, you have a good chance of finding one at a reasonable price. If that's done, here's what you should be aiming for:
Don't stop tweaking it until your car breaks microphones...
Photo credit: kneesamo