header bolts
I have headmans so maybe this won't work but maybe it will. Start the bolts before the header is on the head all the way and start thightening them as the header comes up to the head. I would use a thread sealer on the threads--not thread lock, it might break taking them off. I also got S & K open end wenches to thighten the bolts, I use brand new ones each time and get them as thight as I can, the hard too get to ones, not the easy ones cause you can snap them. I use MR Gasket bolts with RTV on the gaskets but ARP bolts are better. Im cheap