M1 SP vs Air Gap

I think because the cam and headers are small for the package, the smaller plenum and longer ports of the dual plane will make more torque where you are using it. Might be dowm on overall horsepower but torque will be up. Also, the 4000 stall is too high for your power curve.... I think if you could hook it you will go quicker and faster with a lower stall tighter unit. That package shuold have peak torque around 3K with an almost flat curve, and peak HP around the 5K range. If you told dynamic you drag raced... did they give you the "we got a 9.5 that will be perfect.." line? I have to usually be firm and tell them I want it at 2500 and as tight as you can make it in a 9.5"...lol