V-20: I/O or OB power?

Need some help deciding. Details posted in "Performance" forum. Thanks

[Brian_M]

Hello,

I have a '75 V20 with a 165 hp Mercruiser, so far I'm happy with it although with age it's getting harder to get parts for the intermediate equipment ie trim pump, shift mech...engine and outdrive are still supported well. . Performance wise it's OK, cruise at 2400 ERPM and 24 mph, runs quiet and is well balanced. I haven't figured out MPG yet