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Don't bet on a turkey pan to solve the idle issue. Hot air still rises up to the scoop and circulates around the motor confines while a little may escape the hood scoop. I just live with a 1200 rpm idle at at stop sign, since it does go down within seconds. I had to carry a screw driver around to set the idle speed and mixture screws to get it right. The whole Cobra motor thing when you're trying to manually adjust fuel settings for the street on 550+ HP is challenging. As Mike mentioned, make sure to keep the transfer slots away from the idle mixture equation as much as possible. If you get too far up on the idle screw you open up the transfer slot and you quickly become over-rich at idle. I wound up having to drill 3/32" holes in each of the 4 throttle blades to get more idle air past the idle mix port in the throttle bore. Good luck.