ofhg is oil filter housing gasket. I believe it's a pain to get to.
Idk, I like the idea of an s54 into a non m. Sleeper car, but to each his own. Might as well save up for an M3. But I do believe, like you said, a lower mileage m54 motor is a good idea.
But that's also iffy, who knows how the maintenance was in the other motor. But I do think that FI a motor with your mileage is risky. Dont want it to become a money pit
6000k Angel Eyes, Morimoto Mini retrofitted, Active Autowerke Exhaust, Cooling system refresh, ST V1 coilovers, Electric fan swap, 95,000 miles