[blykins]

I started tapping a freeze plug hole the other day on my FE block. Dennis with DSC Motorsport said I needed to use a 1-1/2, 11.5 NPT tap. I borrowed one and went to town.

Has anyone ever done this? I made sure to get it square, but since the tap is tapered, I really don't know how far to go. The freeze plugs haven't arrived yet, so I've stopped work.

It's getting pretty rough to turn.....I'm using a 3/4" drive breaker bar and socket with some Tap-Eze.

I have a piece of 1-1/2 NPT pipe that's threaded....and I can just barely get it started....so I guess I need to go further with it. I'm afraid I'll run out of room though since the cylinder walls are pretty close....

Any advice?