Never knew they made boat specific gaskets. Looks like maybe some material changes to compensate for running water thru the engine vs antifreeze? I guess the next question is do the boat gaskets stand up to antifreeze, or are you better off to stick with the car/truck gaskets? If no solid answer appears you can always call them and ask.

https://www.felpro.com/parts/marine/head-gaskets.html

Rock Auto has some good prices. Never hurts to look there and see what they carry.