Demon Carburetor issue

Hey everyone, I have a 10:1 compression 360 with an airgap manifold, tti headers, ported x heads, comp xe284 cam and a speed demon 750cfm carb that's having some sputtering issues between 1500-2000rpm when in drive at about 25mph. If its left in drive and I floor it at that rpm range it sputters, doesn't accelerate and almost freezes and then after a few seconds takes off. If it is left in 1st it handles it a little better but still has a hesitation. I am thinking this is too much fuel and am thinking I need to jet it down. Any recommendations on what jetting would be a good starting point? I think it has 72 and 76's and a 4.5 power valve but will double check.

Thanks