Carb too big?

I wouldn't even put that carb on my 65 Newport w/ 383. Not only is it too large for a 225, it has mechanical secondaries that will open as you floor it, so the gas would just dribble in at the slant's air flow. The only big carb's I will try on my 383 are spread-bores - I have a Thermoquad and a Quadrajet. They have very small primaries for good mileage and drive-ability, but still much too big for a slant (some TQ's flow 1000 cfm with secondaries open). But, FI is even better (excl. the Holley Pro-jection 2D I have used for 20 yrs).

Many use those Edelbrocks. Their saving grace is simplicity and easy adjustment, but they aren't as fuel efficient as a Holley w/ vacuum secondaries. Now that one company sells a nice fuel injection TBI kit for $1000, I see those Edelbrocks declining.