you should be able to shift at 6500 rpm no problem, but when and if you do, check to see where that puts you for next gear. a good rule of thumb is 10 psi of oil pressure per 1000rpm. keep that in mind.
your 1/4 mile time, hmmmmm.................... i'd say low 12's, high 11's? its hard to say, your RT and 60 foot time will decide alot.