lets benchrace me some ETs

so I just got off the phone with Mike from MRL
my engine came of the dyno peaking at 420 HP and 470 ft.lbs of torque

this will go in a 71 duster with a 75 727 and stock torque converter

right now it has a 7.25 rear end with 2.76 gears which will be replaced by an 8.75 with 3.23s soon

I think I have a 28 inch tire but I am not sure



anyone willing to guess me an ET with this combo?