Man the weather is nice again today, I might have to charge up and fly later this afternoon!
I think... your best option is to get that front end closed up. Make a baffle. It is pretty easy. I will share what I did [&:]:
So this is the general shape you want to cut out (in red):
This is what the side view plane of the baffle should be close to:

You can have this baffle flush to the front of the cowl if you want, it does make this thing easier to make. BUT it doesn't look as cool IMO :P
To get this shape down perfect the first time, I used any 8"x11" paper as a template. Then I cut a half a circle into the long side of it. (pretty much if you visualize the red plane shown in the second picture above, that is what you want your paper to look like). Keep fitting the paper to the outside of the cowl, cutting adjusting, refitting, until you don't have any gaps between the paper and the cowl. Make sense?
Once you finished that template, tape it down to your plywood and cut out the baffle shape you created (The material I used LIGHT 5-ply plywood). Dry fit it inside the cowl and sand "high-spot" where needed. Once a good fit, fuel proof the baffle with epoxy or any fuel proof sealant. Now glue the puppy in! I just used 5 min epoxy around the perimeter. Should be good! (Oh yeah and if you wanted to add a picture or a "twin" engine look, you can glue it in before you seal it up)
That should do it! Basically you are going to decrease the airflow IN by about half and to me you look ok if you leave you outlet alone.
Good luck!