RMCHRGR,
Forgive me, I should know this, but is the Duster strictly a drag car, or will concessions be made for street use, as in converter and gear?

I bring this up, because, like my Valiant for example, I have a 4800 stall speed and a 3.89 gear with a 30 tall tire, hardly ideal for an engine that made peak HP at 6600 rpm. At high altitude tracks or on high DA days, it really struggles to get up on the converter. The stout torque curve is fairly forgiving, luckily, especially since I tend to short shift (old, 906 hyd cam bb guy) but I'm sure the engine would run closer to it's potential with a 5700 stall and 4.30 gears.