New Mancini Timing Cover Fitment Issue

The old cover has an internal seal. The new cover? Seems like I saw this the other day, internal seal, external seal. I can quite imagine that the timing cover is difficult to get on with the pan still on. The oil pan goes on hard with the timing cover in place. Plus, the harmonic balancer has to be in to center the cover. May want to think about that.
I would probably still check with Mancini.