I drove about 50 miles with 0 oil pressure this last summer...after the weekend from hell...I got home, bought another Explorer (well...Navajo) for $250 and swapped the motor out. I wasn't going to even try to fix the motor. I have the block on my engine stand now. I am going to pull the main, and rod caps and see how bad they are. If they are good, I can only assume the cam is good to, and I'll put it all back together and put the Navajo together...
Ryan