engine is not that hot and it has an oil cooler on it. 220 is about as hot as it gets and that is at a stop light after a long run. I guess I will pull the POS out and start digging. I believe it is "Smokey" Henry Yunick's gives the general rule of thumb of 10 psi/1000. I have had some pretty tied engines that build more pressure than this thing, copper on the babbit showing...

If I find something I will take a picture and send it across.

I looked in my 97s' service manual and the main bearing clearance varies with the main cap location. I hope the crank is not F' bombed!