holley 770 problem

I removed my 750 edel carb and put a new 770 street avenger
on my 383 b-cuda. The car has new filters, clean lines and
tank, holley red pump and 13.5 in of vacuum in gear. The
car idles better and cleaner, but as soon as it hits 2000 rpm
it lean bogs bad enough to kill the motor. I tryed jetting up
3 steps, put the black spring in the secondary and a 31 shooter
in it and it still has the same problem.
I just put the edel back on the car runs fine again.
Any body have an ideas on the Holley?