How much CFM for a 360?

I noticed a big difference on the top end when I went from my Carter 625 AFB to my chokeless 850 cfm Thermoquad on my mildly built 340.

The bigger 2-1/4" TQ secondaries really kick in hard. The smaller AFB was soft on the top end.

Factory 360 HP motors came with the larger 1-1/2 primary TQ carbs which are called the 850cfm vs the 1-3/8 primary 800cfm carb.