The pickup market is the hottest vehicle market going right now, Ford GM and Chrys are spending tons of money to get the biggest share. Throwing a few bucks to the boating industry is peanuts for them. They get the exposure to the boating community and have someone actually pay them to test there motors. Pretty smart deal I think. Does anyone really think GM wants to be in the boat business?
Ever watch the offshore races and see all the commercials for the trucks? Their called "Pro Grade" trucks. Ever notice what APBA/LLC calls there racing series?
These HP3 motors will probably wind up in there crate motor catalog, and after the contract is up they'll move on to the next best plan the marketing folks come up with. They all spent millions on drag racing in the late 60's, were are they now? Minor players.
Not that any of this is a bad thing, its just what they do.