Welp I got all the bolts drilled and tapped. 5 in total. 4 came out real nice, I was basically able to pull the old steel threads out, which made lining up the tap super easy to finish the job. One I messed up pretty bad. I tried those EZ-outs. I'll tell ya, there's nothing "EZ-out" about those when they break off in a bolt. I had to buy a tungsten carbide Dremel tip and painstakingly grind out the ez out tip. In the process I knocked my hole off center and messed up the threads in the block. I might have a handful of good threads in that hole after it was all said and done. I guess I'll just have to be real gentle on that bolt. Better than no bolt I guess. If anyone reads this because they found themselves needing to drill out broken bolts in a powerhead, don't bother with the ez outs. Get some some left handed drill bits if you want since you gotta drill the hole anyways and maybe you have a chance of backing the sucker out, but those chances are slim due to the steel and aluminum basically fusing to each other. I maybe spent 45 minutes drilling and tapping each bolt, and breaking off an EZout basically quadrupled that. Even attempting the extraction with an ez out without snapping it was a waste of time. Maybe in the future I'll use a drill press to size up the hole to accept a 6.5 or 7 mil bolt. I suppose this will do.
