how do i get the rocker arm pins out of the head i tried the bolt and nut method and it was coming out but the bolt snapped for sum reason i have another head but dont wanna mess it up i had already done a mild porting on it and cleaned up the casting flaws other head is gunked up bad in the chambers is there anyway to get the broke bolt out the pin or should i just trash that head and go with the other and clean it up and port it