I would love to have a 351 cleveland mated to a OMC King Cobra outdrive, but I am sure that i will end up with a 350 on a Bravo 3 or a windsor on a Penta. I don't know about parts availability for the king cobra. I don't know much about the Pentas, but didn't them or volvo invent the I/O drive as we know it back in the 50's? I hear they are pretty good. With any of the drives mentioned, can I get rid of the bellows and run thru-hull exhaust. I just love the sound of a through hull gurgling.I had forgotten about those Penta dual props. What is the thought there? Pros-cons?