727 trans shifting at 6200 crossing the line at 6000rpm I’m guessing on the lbs with me in it 3400
Hooker headers 3 inch with open mufflers not sure of the brand
How tall of rear tire?
With that “ tall” of gear and it only running 102 mph 6k at the stripe sounds like a bunch more than i would have expected
Mine runs 15 or so mph more with a 28 by 10 tire and 4.10 gear. I shifted at that time at 6k and crossed at about 6150
Unless your tires are ultra, ultra short you have something going on with your tranny/ convertor
