ok i just replaced the motor in my eg civic. i put a clutch and fly wheel in it. when i first started runnin it would burn first and second. now it barely chirps 2nd. i think is just enough to be messin up my valves slowly. i want to put new valves in it like skunk 2. i dont know if i have to have new springs or not. i know it wouldnt hurt to have it but i also want a cam gear and maybe a cam. does anybody have any opinions. also how far could i shave the head without hurting the motor.