Carb Suggestions for 5.7 Hemi

So I've had my 5.7 swap project done for a few weeks now and back on the road but am still trying to tie up some issues. I got an Indy Mod Man intake (single plane design) for the hemi so I could do a carb setup and am running my old Carter Comp AFB that was on the 318 that was in the car. From what I can tell, the carb is a 625 cfm model with weighted secondaries. The timing is taken care of through an MSD 6 Hemi ignition box (basically an electronic distributor that I can set a vacuum and mechanical curve in). It comes with a canned tuned that is designed for stock engines, which mine is aside from headers and the intake and carb setup.

The car currently has some stumbling issues off of low rpm launch like a stop sign when I drag the engine down a little too much clutching it and has hesitation under hard throttle. I'm not sure if the low rpm is as big a deal because I don't have my tach working yet and I might just really be dragging it down, but the hard throttle hits are annoying. It seems like the problem happens probably right when the mechanical secondary blades are starting to open, but since they are weighted they aren't exactly easy for me to modify to test. If I keep the pedal under half throttle on a hard hit the engine takes off fine, but any more and it starts to stumble and bog before coming back up.

Anyone have any suggestions as to what I might be able to do to fix the problem? I rebuilt the carb and have tried all the accelerator pump settings, but it didn't seem to make much difference. I looked into picking up a different carb at a swap meet, but didn't really know what to look for or if it would even fix the problem. I had heard that on full throttle when all the blades are open that the fuel may not atomize well initially because of the drop in vacuum, but would a different carb fix this?