Torqueflite Question

A little story of mine. I bought a 94 Jeep Cherokee at an auction. When I was picking it up, some guy comes by when I'm adding oil because it's 2qts low. He says, "it's got a rear main seal leak. They all leak there." When I got it home, I started cleaning, and sure enough the oil was dripping from rear of the oil pan. So I cleaned the area and the pan pretty well, and I began monitoring the leak. It turns out it wasn't a rear seal at all. It was the oil filter adapter. It was dripping oil down the block and down the pan rail and finally dripping off the pan in the area of the rear main seal. It cost like $3 for two o-rings and about 1/2 hrs to fix. It's been drip free for over 150k miles since.