A few months ago a friend let me know that a car I sold was abandoned at local school. Thursday, I finally got that car back! Problem!! It has a 440 with tunnel ram and dual 750 Holley carbs, I built the motor 10 yrs ago and was always worried about the engine getting too much gas. I was told the son of the now previous owner had hot-rodded it until he blew up the engine. I think it had an internal explosion where the fuel built up in the oil. I looked at the valley pan and its raised up about a half inch. I checked oil, its black but free of water. I think engine may be froze, but not sure. There are no holes in the block. It blew all the water out all over the engine and it looked like muddy water. Not sure what to think, I haven't torn into it. Anybody have an ideas what could be wrong?? Or if the engine can be saved or is it toast??

You won't know until you tear it down.

Only time I've ever seen the valley pan pushed up is when pistons are beat up pretty good, usually from a nitrous event.

Pull the spark plugs out and use a wrench to see if the engine turns.

Don't know if you ever will find out how that happened, but you are going to have to pull the engine and tear it down completely and go thru everything anyway.

Let me get out my crystal ball..........Nope.Really,I think a tear down will tell.

Have the oil sampled for gas.

The common ways for gas to get into the oil is either a leaking mechanical fuel pump or fuel thru the carbs.
If it is the fuel pump, i would temporarily set up an electric pump to se if it leaks in that way. It would be a torn difam or seal in the pump. And I would do it with the carb fuel line removed and plugged off or routed to a catch can.
I had it happen to a 350 chevy once with the mechanical fuel pump. That was a neat and exciting explosion. It pushed the dipstick completely out of the tube, and made a pair of rare valve covers, one of a kind!!