Think I still have a problem (help)

[Robert_5_liter]

I went back to the track and ran a 14.23@94.7 MPH with a 2.14 60ft in my 1995 GT and a girl with a 1994 gt stock with the timing bumped up ran 14.39@96 MPH with a 2.24 60ft her car is stock with 106000 miles on it but my car has these mods. 4.10 gears,BBK headers,BBK offroad H pipe,Flowmaster exhaust,underdrive pulleys,MSD Distributor,Ram air,B-303 cam soon to be E-303,Hypertech chip,and if i scan my dcl data it shows my timing to be at 28.0 degrees total advance at 5000 RPM,but the car makes no power after 4700 Rpm. I also go through the traps at 5200 Rpm on its face,some people tell me to put the stock distributor in it and try it but i dont know and i have many chevys to beat also if i scan it at 1800 RPM the timing is at 38-44 total advance but pulls back as the tach climbs.

Help Thands for reading