Need a new carb

I'm lookin at the Holley street avenger series but what cfm should i go with. Also I'm still running the eldy small intake runner 318 intake, the one for the smaller head ports. So would I feel or have any power gains by switching to the rpm intake or the air gap rpm? Also what gears should i go with. All the engine spec are listed below:

CID: 360
Heads: 340 J heads
Compression: 10 to 1
Cam: CompCams PP484 284 292 duration .484 lift
Stall: 2800 to 3200
Tire size: 27 inch