Trust me guys, I'm not that excited about this job. I'd rather go do a few suspension overhauls than an oil pan reseal on this beast. I already explained to the owner that he should just leave it alone, but he wants it fixed.
With that said, it does appear that the oil drain plug is part of the problem, but there's also oil coming from each of the oil pan bolt holes. He recently had the oil filter housing and valve cover resealed, but I will re-check those areas.