NEVER put a 750 on a 318........

375 cfm x 2
So primary cruising is essentially like a 375cfm 2 brl.

But hey lets not come back with a generalized take away, we know small primaries mix at a greater velocity and work.
Small port heads or small 280 cfm primary thermoquads... we can make a lot of things work... and we can stand in both lanes if the combo is edgy or intended for rpms that will use that larger cfm carburetor.
Booster design, secondary actuation type, tune, weight , gear. Rpms..
It would be naive to say or use a generalized example that paints this picture of a stock 318 with a 750...when it's not.