I've read ads that say the lower the winch, the better air flow to the radiator, thereby preventing overheating. And as we all know, if it says it in the ad, it must be true.
On the other side of it, ones like the plate I pictured claim the raised area acts as a scoop, of sorts, funneling air into the radiator area.
"Gee, Wally. How come two guys say two different things, and both say the other guy is wrong? They both can't be right, can they?"
"Gosh. I dunno, Beav I think maybe you better ask Dad. Old people know stuff like that."
"Yeah. I s'pose. Thanks, Wally."