Quick Fuel carbs?

[Dagger]

I've got a buddy looking into a Quick Fuel Q-750 4150 style carb for his 67 Shelby GT350. The carb is a 750 cfm with mechanical secondaries, billet metering blocks and baseplate, along with a host of other mods. Anyone have an opinion on the their carbs? How would this carb work in this application:

The motor is a 348 SBF with a period correct Paxton supercharger running 5-6 lbs. of boost max. The carb is encased inside the stock sealed paxton air box. I believe it has iron 289 HiPo heads and is running about 10.25:1 compression. I can get the cam specs if needed.