Well, here's what I think. The gears on a 2002 Pantera 600 efi are 24/39 or 1.63 gear ratio. The eng. max rpm is 8200 so the top speed would be 108 mph at a 1 to 1 clutch ratio. If the clutches shifited into overdrive (which I think they never would) your top speed at 8200 rpm would be 119 mph.