sealing hood to Carb any HP gain?

My car is a BB 500 stroker and It spends a considerable time at over 100 mph. Road Coarse car.
Questions:
A
Would I notice any improvement in performance if I seal my 5 inch six pack hood to my Carb at those sustained high speeds
B
How would I do it and also get good filtration?

Sometimes I have an overheating issue when I am running 90mph plus for 25 minutes..I bet I get alot of turbulence from the hood scoop and I read on here to seal your scoop to your carb for that very reason. The air entering the engine compartment can interfere with the radiator