Would a hood scoop help my problem?

No hood scoop as of yet, but yes would seal it up.
My water pump turns on at 160 and cooling fans turn on at 180.
Wouldn't be two hard to re rig up my full throttle switch to kill my fans instead of my alt like i had it before.

Just can't decide if i should mess with killing the fans at full throttle, or just sealing the carb from the radiator/header heat?

Seal it , dam sure cant hurt !!