I had a 365 with a big perkins/westerbeke in a vdrive configuration-which I assume is the same on your install.. Access really was not to bad for all routine
service and some unplanned
service. There may be an access panel under the sink-if not you should add one. It provides good access to the
fuel filter,
lift pump and
alternator. Removing the
engine box gives good access to the injectors and high pressure
pump for bleeding. The
water pump">raw
water pump is tedious, but doable via the starboard
cockpit locker. The only real bear was changing the oil-dipstick tube was portside and accessed via the sink access panel. I
remote mounted my filter making changing
oil filters a snap. The pan is so deep I ran a hose off the drain
plug in the pan to an easier location with a petcock wired closed between
oil changes).
good luck