I need to fit a new, as in refurbed but new to me, Bravo 3 drive onto my 7.4L. The sterndrives come with various 'Ratios' (2.2:1, 1.5:1) which I understand are determined by a combination of boat LOA, weight, etc, but I'm unable to find anything definite.
Boat = Mariah Z280. LOA = 27'10"...