6 speed tranny and gearing is tough to get right. Launching a 6 speed is even harder. You have a great trap speed...enough for mid 12s easy. Get that 60 foot down to a 1.80 and you will be mid 12 no problem.
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if it's cheap & reliable, it ain't fast, if it's fast & cheap, it ain't reliable, if it's fast & reliable, it ain't cheap