Hello My car now has 4.6 boss block big bore stroker 8 bolt crank with a 26 spline tko 600 trans. I currently use Spec stage 3 6 puck and hit too hard. Car 725rwhp but only 550 tq. I drag 20 days a year but drive to/from track and cruise. Car 3700lbs me in it. I don\'t want over clutch, which of these reccomend 6435807M vs 6435807HD ? Thanks Brian
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