The cowl scoop is 4" tall and it is probably about 8" from the windshield. My 4.5" K&N air filter fits good underneith it. I am thinking about glassing in the underside of the scoop and sealing off the back leaving the very front part over the rad support grill section open. Then making an air pan to seal the carb to that. The contour of the inside of the hood reminds me of the aero scoop I have.