Convince me to not use this carburetor.

Is this a street car or race car? The 500 Holley is great on a race car. The 350 Holley is better for a street car. The Autolite 2100 is a great carb for the street. The Jeep guys love them, and there used to be conversion kits on eBay. Which included a rebuilt carb.

Also I wouldn't waste the money on the 2v Hurricane manifold. Go straight to the 4v version and run an adapter. You will be better off in the long run.