According to my calcs 500hp@3500lbs, 4.30 gear and 28" tyre?, your slip would look something like this on a good hit>

Power to Weight Ratio: 0.14 : 1 (HP per 1 Pound Weight)
60 Foot E.T. : 1.55
1/8 Mile E.T. : 7.03
1/8 Mile Trap Speed :96.68
1/4 Mile E.T. : 11.14
1/4 Mile Trap Speed :120
1/4 Mile Trap RPM :6,210rpm+slip
of course things vary on the day. and just to add another opinion

1969 'Cuda 446ci, best 9.96@133.9 in 1990
1971 340 'Cuda, best 11.01@122.8 in 1987