The IMS cover flange appears to have a shallow dish, which means it's a dual-row bearing. Oddly, the flange is secured with hex-head bolts. Every other one I've seen used Torx. Ees a puzzlement. Perhaps I should replace them with Torx? In any case, after the lift table arrives I'm going to pull the bearing and eyeball it before I order the new one.
I also drained the oil from the new engine and removed the filter and inspected it. It was clean as whistle, of course.