just curious which way is least complicated and most reliable., a low boost supercharger or heads, cam etc? will either be effective without thru hull exhausts?

The day after labor day and you want to start this winter chit already???

I realize your fromm the great white north but christ man, at least wait for the leaves to start changing!!

without doing exhaust you are pissing in the wind

I believe that exhaust scavenging is not as important with forced induction as it is with normally aspirated, but I don't think you can get away with forcing that volume of exhaust through an opening that is approximately 2x3 inches. It's a bit like John Holmes trying to fornicate with a chihuahua.

Speaking of John Holmes, while being relevant to the opening post, you could always use Donkey Dicks if you want to expel your exhaust under water.