Too much gear?

I ran the same cam (296/557) in my Demon. It had ported J heads, Holley Strip Dominator intake ,750 Holley, Carter mechanical fuel pump,1 5/8 headers , 4.88 gears. The car was stock weight with bench seat full interior , 3 inch exhaust with Flowmaster mufflers driven to track.It ran a best of 7.10 @ 95 mph in the 1/8 shifting at 6300 rpm. According to the Wallace calculators that should be around 11.18 at 118 mph. I think you have something holding you back.