Was not expecting to get the engine mounted tonight but my very thoughtful neighbor (A&P) came by and I think it took us ten minutes to get it on the mount. More time to tighten stuff up but that was way faster than I expected.
Gave me time to play with the filter adapter and the standby alternator. It appears everything will fit but probably a specific order for attaching things to ensure I can torque all the nuts properly.
That IO-390 is a looker for sure