A hot vette

I've have a 77 corvette. I'm running a newly rebuilt 383 with about 800 miles on it. Recently I overheated it, (due to a junk radiator, with a leak). The coolant temp reached about 230. After that, I found a huge oil leak. I thought it was leaking out of the front cover. So, I replaced it with a two piece unit, and threw a new seal on the pan while I was at it. I figured this would fix the problem. I was wrong. As it turns out, the oil was coming out of an accessory hole in the front of the block. I've never seen oil come out of an accessory hole before. The hole is located near the fuel pump, just under the head. I think the old AC bracket used to mount there. I threw a bolt in the hole, and it plugged the leak. My question is, Why is there oil flowing out of an accessory hole? Did I manage to damage the block when I overheated it?fficeffice" />>>

I doubt that 230 degrees, unless they were centigrade degrees, are anywhere enough to damage the block. Some of these accessory holes are drilled too deep leaving too little material between the bottom of the hole and the inside of either the cooling jackets or the crankcase. My guess is this is one of those too deep holes that ended up intersecting the crankcase. What you did with a bolt (add some teflon plumbers tape) should be an adaquate solution to the problem.

Bogie