Sure you can, some do quite sucessfully. However I think you will find the marine hardware alot harder to find and more expensive when you do find it. My son has a 383 in a jetboat, runs great, plenty of power, but without the headstart of having most of the stuff from a previous boat it would've been tough and expensive.. For that reason, you don't see near as many Mopars in boats as Chevys and Fords, and of course the 455 Oldsmobiles. ....MP