helicoil in heads

ok, i am still not done with this project.

I put the intake back on, and with 3 bolt left to tighten down, it stripped the thread in the head. Another trip to town to get a 3/8 helicoil pack. Got back and looked at the rest of them, there are quite a few intake threads that already had helicoils in them. One of which was not drilled square and had been a pain to put the intake on the first time. So of course when i am drilling one of the 2 i did tonight, i thought i was drilling square.

Turns out i wasn't and not i cannot get that bolt in because it is angled down too far. I took the rest of the bolts out and moved the intake so that i could get it started, and then tried to put the rest of the bolts in. But, it moved the intake too far and i wasn't even close to starting the bolts on the opposite head.

How do i fix this? Can i redrill the helicoil? or do i have to drill (at the correct angle) and tap it to a 7/16?

Possibly use a dremel tool on the intake to get the bolt to clear with the helicoil i put in?

I need to get this fixed tommorow night and get it all back together to go to a transmission shop on thursday. Hopefully there is a way!

Thanks,

Steve