Okay, firstly, I'm a Chevy guy, mostly because of the old cars that I enjoy. But, with brand loyalty aside (if at all possible), why weren't Dodge/Chrysler 440's as prevalent in all of the old performance boats of the 60's and 70's? IIRC, the 440 was produced between around '65 to late 70's, when all of these boats were getting stuffed with 460's, 454's and 455's. Just morbidly curious. I have no plans to build a Mopar powered boat, but I've often wondered why they weren't as common. I was thinking that it could have to do with relatively thin cylinder walls, cylinder wall flex and/or likelyhood to experience core shift? I don't know much about the Mopar big blocks.