Bad-habit,
Mines a 1989 272. Two big blocks are tight. Worst thing is the sea water pumps

. I finally got it down to an hour each. My new engines have crank mounted pumps. This way I can kneel on the bad seat , reach down remove three screws , loosen the forth , and change the impeller in 15 minutes

. Just tried to post a pic. of the engine compartment but it was too big. I'll try to pm you.
OOPS , can't send a pic on pm

I also searched for nine months from NH to VA to find one nice enough.