Perhaps I can't see the forest for the trees, but if my lowly 440 (452) 3750# street car with 4.10s and a Dynamic 4500-flash 9.5" can pull 1.45"x-1.46 60s running 6.6s at 101-102 MPH, why is the OP pulling low 1.5x 60s like my car did back when it ran 6.9-7.0 at 98 MPH?