That's the pan I bought, but the fit was so bad I sent it back and reused the stock one. A lot of debris gets into the baffle over fourty years so one has to be sure to clean it out well. I had to bash, I ment massage, the pan on one side for the roller rocker clearance.

I'm pretty sure the drop base flows enough with the three inch element and curved pan design. Airflow accelerates as it moves toward the horn.

I have a fuel/air ratio gauge in my car, when I get a chance I will make a run with the lid on then another with the lid off and compare ratio. Or maybe do it in the garage. I have the same ratio now as was on the dyno, they have a monster air inlet so now congestion on theirs.