You certainly don't need two 750AFB's for the power level but it's got to look a LOT better than a single 4 barrel set-up.
The T-II will make the most power on your build, requires at least a 1" spacer and 850cfm carb.
I did a 455 about 20 year ago with Edelbrock round port heads, 231/240/113 cam, T-II intake, 1" spacer and 850cfm Q-jet. It made 505hp/551tq and pushed a 3900lb car to mid 11's at 118mph in full street trim on DOT's.
The RPM intake and no spacer on the dyno dropped to 487hp so we went with the T-II instead. I'd add here that both intakes made pretty equal power to 4500rpms. From there on up the T-II really showed it's colors........
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73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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