First of all, does anyone know where I can find piston to valve clearance specs for the 1986 motor? I want to run 1.7rr's in this motor, but not sure if I will have issues with P/V contact. I know you cant change the cam if the motor has flattop pistons, so I'm trying to figur out the max lift I can get with the KB pistons. Any info on these heads is really helpful. I can't seem to find much....:SNSign: