Something like Clyde did with his cowl openings would look really cool! I forget what he used but it looks really nice.
Actually I once used some wire mesh much like clyde did and it looked ok. I kept it for about a year or so. The problem I had with it I was always having to remove it to clean in the cowl openings, big pain. Leaves and stuff gets in there and on one of the clean outs I bent the wire mesh and decided the heck with it and just deleted it. Something like that is great on a show car but mine has always been a driver and sits outside half of the year but I still agree the openings seems to need something.