Dude I had a sailboat for ten years, only installed a motor when I sold it.....
you gotta get all medieval royal navy if you want to get the chicks.
bayliners , almost all of them are I/O drives, probably with 350's...
here's a cheapie.
25' Bayliner Cabin North Nanaimo, Nanaimo
Legs are brutal for costing money tho. volvo even worse, think toyota dealer prices x3.
a straight drive would be better ...probably easier to adapt too.
Lots of old chris crafts are straight drive , or v drive... here's one..
1980 Chris Craft 25? Cabin Cruiser Outside Nanaimo, Nanaimo
that'd probably be the sorta thing I'd look for...good if it has a trailer too, moorage is brutal these days, heading towards $10 per foot per month, and that's IF you can find any...most places have 2year waiting lists..
Bigger binliners, like 3288's have 4 cyl td hinos in em, that look an aweful lot like a 3B (13bt or 14B possibly?), be slick if the trannies would match up...( some of them are ramped up to 200 hp, you'd have to tune em down for a truck as the cooling isn't as efficient, but had me thinkin more than once...)
course, my present boat is a 24' kinda rotten 1960 sailboat, taking up space in my garage, that if it gets a motor at all, will get a 2hp honda... (dang phrf nazi's insist on having an engine aboard...)