disregard what your uncle tells you, your engine will run on 87 with the 10.88:1, but you will find your cleaning pistion material off the sparkplugs, and eventully the need for new pistons when a hole is burnt through them. go to 9.5:1 comp ratio, and instead of using the 76cc heads, get some smaller 64cc heads, Dart Iron Eagles or somthing like that, still 2.02/ 1.60 valves. If you want a very drivable car, look at 400-450 HP, 500 hp will be very touchy, and require a lot of extra's to make the car hook. and for reinforcement