Don just like everything else you have to try to know if it will or not, when I sealed mine on the 408 it picked me up 1.5 in ET and 1 mph but the scoop was on the car already with the 366 so I don't know if that helped or not or how much, the one thing that I found out was that I had to put a blocker plate in at the rear of the scoop to close up the cavity at the rear of the scoop it self because it would go turbulent enough to suck fuel out of the bleeds at higher speed's and would cause the car to become inconsistant, I used to have pic's of the gas stains from the bleeds running down into the carb.