Brian,
I like to fish cheap for as long as I can, so I like the idea (sorry I'm getting so technical here...
)
I've never seen a performance bulletin on the 27 so i really don't have a clue as to the weight involved. I don't recall a rebuild thread on your 27 so not sure if you cut some weight with current composites. I think the 300 e-tec could get you near 35 mph with a big ole SeaCraft friendly 15p prop and it will likely double your economy at cruise over the 454/Bravo and untold gains in the manatee zones
Etec DIs at idle and low speed troll kick a$$ on efficiency so I'm not sure I'll bite on the 4s vs 2s argument any more. Nominal at best with modern DI at play.
Less weight, less drag, cleaner water for prop = better perf.
Might consider a big bracket on that will accommodate twins in case you are unsatisfied with performance, but overall, I like the idea.
Side note - what did you repower the 21 with?
