I finally mustered the mental strength to complete my bellows. Clamping the drive shaft bellows to the bell housing was a real treat. I never found any instructions or video on clamp placement. Seems most everyone has videos on the press sleeve. My first attempt was a fail since I couldn't reach the clamp screw. The second attempt went much better after repositioning the clamp. The exhaust bellows were simple. Next time I'm going to make my own video. I think I can do these pretty easily now. I tightened the pivot pins, installed the trim and limit senders, and inserted my shift cable.
I started filling my lower up with gearlube. Lubricant started flowing out of the water weep hole on the front of the lower casing. Grrrrrr!!! Separated the halves and discovered I have the wrong water pump base installed. The rest of the waterpump kit was ok, but the base doesn't have a flange for the gasket, nor does the o-ring seat properly. It appears as though Sierra sells the base, just not with an entire kit??? 18-3420 is the sierra base. 46-44292A3 is the mercruiser #. Pretty confusing. I sourced an SEI pump base with the same p/n. Also ordered my remote oil drain kit.
Pictures to come later. My wifi is out so I don't want to use all my data.