I think I'm going to go with just tapping the head for the bolts this first time and leave the extra material there for helicoil repairs if necessary down the road. The Jesel setup uses seven 7/16-14 bolts so there is a lot more clamping force than the stock setup has.

I've gotten some good help from Jesel lately. I think they sorted out internally that there weren't instructions for this kit and that there could be guys like me who aren't professional engine builders who might buy the kit. Last I heard from Jesel they were going to put some instructions for this kit up on their website.

I've been pretty happy working with the guys at Jesel so far. You can tell that they are used to working with top end professional race teams. Super professional attitude and knowledge.