Carter Carburetors ~ Advertised CFM Ratings and Corrected CFM Flow Ratings ~

Good for comparison. Seems like your University set-up was similar to Holley's.

Interesting to note that both Holley carbs you tested are listed with the same venturi and throttle bore diameters, and both had downleg boosters:
P venturi 1-3/8
S venturi 1-7/16
P throttle 1-11/16
S throttle 1-11/16