Blower ducting

I've been working on installing dual exhaust on my 96 176. The exhaust tube goes right in front of the hole where the blower ducting is. It's the hole that goes through the stringer. I've tried different possibilities, and it's not working.

I'm now wondering about running the flex ducting down the center of the bilge near the exhaust tubes, and then connect it at the top of the transom where the other ducts exhausts.

i also thought about mounting 2 blowers back behind the gas tank, and letting them draw air from the 2 holes through the stringers in the bilge. My concern is that it might be easier for the fans to draw air from the bow instead of the bilge.

Any thoughts or ideas?
Thanks

AlfaDon wrote: My concern is that it might be easier for the fans to draw air from the bow instead of the bilge. Any thoughts or ideas? Thanks

Suck from the dog house and aft. That's typically were fuel vapors will be.