[Bushwacker]

In the mid-70's a good friend of mine repowered his SeaCraft 21 with a 250 HP Mercruiser, but Frank Brown of Brown & Hauptner Marine, who occasionally used to crew for Moesly in his race boats, changed the upper gear case from a 1.5 to the 1.65 ratio because he thought it would be an improvement. A couple of years later, that engine rating was changed to 260. The only obvious change was that it had the 1.65 ratio instead of the 1.5! I think I'd stay with the 1.65 ratio!