I run 2 on mine. I may actually vent the back of the scoop with some screen. This new combo should run 135+ I can also see the top of the motor on the big end.. lol
When I run 1/4 mile I am up at 138 with mine. The rear of the hood lifts 1.5-2". I may end up having to vent mine as well. At one time I thought about adding an air pan to the carbs and sealing them to the scoop, but with no where else for the air to go, I was afraid that it would pull it off of the hood.