One suggestion; based on the quality of carburetors I've seen on my own cars, get a QuickFuels or ProForm (basically the same company) DP instead of a Holley. Two things to recommend them both over Holleys: everything is adjustable easily, and the quality is MUCH better; all the construction is billet and machined, they don't have internal leaks, and they are a lot easier to work on. They have really eaten Holley's lunch if you ask me.
I'd get a DP if you want throttle response. Sure, you'll use more fuel, but these aren't economy cars anyway. VS carbs have more lag in them, I think, as you wait for the vacuum to pull the secondaries open.