Got it repaired, used the head for guide during the drilling (good tip yellow rose) Probably should've for the tap but everything ended up working out. In hindsight i shouldve drilled farther down prior to tapping but i followed the directions and it almost screwed me. Didnt realize how mich the helicoil stretches out during installation. Had to file a ridge out of the top of the bolt on the deck surface, it happened when the block stripped.
Final assembly with 100ftlbs, whew glad i dodged that bullet.