So i launched a rod on my 2000 stock block and plan to go built. My question is am i wasting my time putting springs retainers and cams on my heads even though they are only 4 thread and have the fear of launchin a plug and have to redo them again or should i do something different. I dont really want to have to dumb a load of money on all new heads and everything especially i need to buy a shortblock and some other supporting mods. what should i do guys?