There is something called cooling drag, where the drag that it takes to cool the engine comes into play. You only need what the engine requires to cool it, the rest is drag. You might find some formulas in the aviation community.
Agree with this, maybe copy the sq inches of opening a daytona uses, seal the radiator to the core support, seal all holes in core support, and inner fenders to get air thru the radiator only, and not out around tires and under fenders and , seal the lower support to the k- frame to get the air out further back, figure out a way to get some out of inner fenderwell areas with air dams up front. Anything to get air out and lower opening square inches will help. I dont kbow if removing the seal at rear of hood would help or hurt. Less opening, lower car, seal some holes. Figure out some way to extend front valence rear edges furter back and seal to keep air from getting under fenders. I have a cuda and a superbird, cuda feels front light at 100, the superbirds never feel that way, they spent a lot of time on cooling drag, or at least getting it thru the radiator and not everywhere else on the sbirds and daytonas. The air is boxed to only go thru the radiator, and exits after the k-frame on a wingcar. If you can't lower the car maybe fab up a bellypan starting at firewall, end at rear springs, to smooth out the bottom, should reduce lift.
