I should add one other thing...
My situation is that I will be upgrading from a stock UIM/LIM setup (with 31mm/32mm lowers) to the full BAT setup (34mm/35mm lowers + double EH uppers + SVT TB + 19lb injectors)
I'm hoping that the 19lb injectors will compensate directly for increased size of the lowers and increased airflow of the rest of the SVT stuff. Unlike other Cougar owners who already have the SVT lowers with their returnless systems, my EEC is calibrated for the smaller diameter lowers.
(If anything, I suspect that I will most likely end up dialing down pressure by a few PSI with an adjustable FPR to tune for an overly rich condition)