I had one break, so I had to pull the head to drill it out. I have only drilled it the size of the original stud. Can I get a screw in stud and just tap the hole and put that in instead of trying to press in the new stud? What size does it have to be tapped for and is there a special stud that has to be used since I'm not doing all of them. I running a stock motor, no roller rockers or anything like that. Thanks.