New combo looking for some input.

I recently picked up a 69 340-1 .30 over with flat-tops static compression of approx. 10.75:1 stock 69 "X" heads with minor porting work on the intake side and gasket matched to the intake. The intake is a Holley single plane "Strip Dominator" The cam shaft is Comp cams Flat tappet (20-618-5) .540 .540 lift and duration at .050 is 255 LSA is 106. 4000rpm stall with 727 trans. Going to run 4:10s in the tail. This combo is going in a 72 A-body I was planning on running a Mighty Demon 750cfm. Any input on this carb would be great, I have not bought a carb yet but I found a good deal on a local classified site. My vision is a high revving small block (7200rpm) for Saturday night abuse. I should mention the valve train is all Hughes engines components. Any one running a Demon 750 carb?