Should be good with wide open thottle at indicated 60. I have to let off a little at 60. I run the NCY transmission kit. It kicks ass!
Change your oil often, and use a magnetic oil drain plug, you should be good.
Indicated is not what the speed is. I GPS'd the speed. 60mph = 54-55, 50 = 46-47, My 63 mph run in a tuck stated 68 on the speedo.