Edelbrock Air Gap on Magnum 318 Problems

I have been running an edlebrock air gap intake on my magnum 318 and can't get the hesitation worked out of idle. I have been told the intake has too much plenum for 318 cubic inches and this combination will never work. Can anybody give me some advice?

Engine details...
1994 318 Magnum stock crank, pistons, bore all rebuilt
Comp Cams 264/270 adv dur with .512 final lift intake and exhaust advertised
Harland Sharp 1.6 ratio roller rockers
Heads are stock magnum milled .010 with hughes springs to match the cam.
Heads have had some home porting and have been gasket matched to the intake. Intake was gasket matched as well.
Heads were treated to a valve job recently and checked for cracks-all is good.
Ignition is stock Mopar electronic tuned to run 16 degrees initial timing and then 31 degrees at idle with vacuum hooked duirectly to the intake manifold. Timing past 3k rpm is set to max out at 34 degrees using a timing plate from FBO.
Compression is 9.27
Carburetor is a Holley HP 650 installed new. I am running 71 jets on the primary and 75 on the secondary. Holley tech had me up the primary jets. They told me it would help the issue. I later found out they were wrong.

Can anybody offer any help here? I have been fighting this problem for almost a year and just can't win.