Problem with head ported on 350

Hi
Last winter I rebuilt my chevy 350 tpi of C4 Corvette 88, with some modifications:
Hypereutic piston with new CR to 10.4:1
Stock crankshaft and camshaft
Kit roller 1.52 ratio
Reworked aluminum head and intake with porting
Minor porting to stock roller (open to max diameter of standard gasket)
Now I work with ARAP bin and TunerPro, and modify MAF table 2 for obtain correct BLM (plus 2% in center of curve) and modify table 4 and 5 (plus 2-3% to stock values) because the engine run a little lean at high rpm.
But I have a problem from 1500 to 2000rpm, the engine it is hard to get up rpm and misfire, after 2000rpm the engine run without losses. Someone had the same problems and can help me?
What tables should I modify/verify for check the problem/tuned correctly?
Thanks for any answer