he said he didnt want to turbo, id say look into ur head and valve train, check into lightened flywheels if ur not worried about loss of torque, act clutchs are very well made and about the same as a stock replacement in price so id suggest act, if ur planning to keep it n/a then crank the compression up a bit by lowering the head gasket size, and go with ur high compression pistons, just make sure u figure out what ur final compression is so u can raise ur octane level accordingly, possibly get an ignition controller to get a stronger spark into the engine