Change to Edelbrock Air Gap (?)

I am currently running an early 80's Holley Street Dominator intake in my 1970 "340" motor. It runs well and I rarely drive the car. Mostly for cruising and 1/8 mile drag racing. I shift at 5800 rpm, run the purple stripe Hemi grind cam, have 3:91 gears a 750 double pumper carb, MSD electronics, Flowmaster exhaust with 2 1/2" pipes, and 3,000 rpm stall converter in a 904 trans. The car weighs 3,600 lbs with me in it. I was wondering if I will see much improvment performance wise with a change to the Edelbrock RPM Air Gap intake. If so how much and at what rpm. Or perhaps is there is a better choice out there for an intake besides the the Air Gap?