Safe to bore a 383 60 over?

inertia said

I have long drill bits I run from the main and head surface to "line up" the holes.
Dress the bearing as nec.
Let the drill bit do the job, gentle pressure on the drill .
Good luck.

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Unfortunately, the hole that didn't line up isn't the feed hole from the main. It's the feed hole to the head on drivers side. I took a drill bit ( initially couldn't get any drill to fit in the confined space) and turned it with my hand to try to get it opened up...lol
Finally, I found my 1/4" snap on electric driver and got the bit to go. It's not as clean as I wanted, but I dressed up the bearing with WD and krokus cloth. The feed hole so much better.
I ended up cleaning the water passages more figuring that I'm going to clean the block more thoroughly anyway.