Standard formula is:

1/8th mile ET x 1.57 = 1/4 mile ET

5.5*1.57 = 8.635

Maybe a little closer to Brian's guess depending on how the car runs in high gear, it really 60's well


-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA