Thank you for the quick replies (very nice to have help!)

Thanks for the compliment on the paint (I own a custom hod rod / paint shop) so that's how I make a living, it is also what get's me into these situations.......CUSTOM.....I am never content or satisfied with anything normal or easy. I always have to be thinking outside the box, or a different (not necessarily better) just different way of doing things.

The max rpm is a great point also. Beings a 4-stroke engine I could "throw" a larger diameter prop on each drive also (which should help lower the revs a bit) Since they are 4-strokes they should have no problem swinging them. Plus the custom flywheel could be made so it would run best in a certain rpm range also.

The fuel is a perfect suggestion, and makes perfect sense. Lastly moving the regulators would be no problem as I have plenty of room in the hull.

Many thanks. I'll keep you posted when I get nearing the end.