My father bought the Z brand new in 72, and I(19 years old) now am in love with the car. I have done a lot of work on the car-reupholstered seats, cleaned 20something years of grime off of the mags, replaced brake master cylinder, clutch master&slave, etc.-I have a pretty good sense of the car and mechanics in general. My question is what is the best way to tune the car up to get maximum horsepower and efficiency without changing it too much?(I want to keep it pretty much stock and classic) My usual tune ups include new plugs, wires, dist.cap, points, oil&filter, and a little slick 50 in the tank. Is there anything else I can or should do to improve performance and have the car run like new?(engine was rebuilt in 90 and has about95k on it.) THANKS!