They should make a lot of power pretty easily with the right valvetrain.

Good luck on the project! We love pictures so post'em up!

Doubt it would change the cost at all to be over 600HP a side with that much displacement. The power is going to be the springboard going forward for the whole project. Just because you have 600HP doesn't mean you have to use it.

I pick up the engines and the boat August 8th , I will post pics. I’ve been participating on various forums for snowmobiles and cars since about 2004 and have met awesome people all over the country. It’s a fun hobby traveling around pissing money away trying to go fast
Yes you’re correct. I will choose an appropriate package and make the most HP I can within reason.

Has anyone completed a project with these motors? I see that a few people have taken about them but not seen a finished one.

Does the aftermarket support these?