so i just recently got a 1982 6.2 k25, i bought it from a kid who inherited it from his uncle after he passed away. he said that he fired the engine up and got it running and drove it down the street and it started running away on him. the truck only has 100k on it and is very clean. i checked the oil and its way over full and smells of diesel. i've been researching for a few days now trying to figure out what the problem is and it either sounds like its the lifter pump diaphragm has gone bad and is putting fuel in the oil or its the injection pump fuel solenoid is stuck open and feeding the fuel into the oil that way. i was going to start by checking the lift pump then check the solenoid on the injection pump. anything helps and is much appreciated. i read another post from a guy saying he called a mechanic up and he refused to work on his truck, well i had the same situation happen to me and i just laughed and said "of course". the truck has been sitting for about 3 years.