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Running the 4150 M1 on the 493.

iron heads, 0.530/260 @ 0.050 cam, makes enough torque to cook the 315 drag radials at will.

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Thank you.........I laugh(sometimes)when I hear about guys that can`t get a single plane to work on a fairly mild combo........kinda like t-rams do`t work down low. Get the carb clean and tune right and I`ll take the single almost always.........

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I never said a single plane CAN'T work.... It'll work just fine. I just think you're giving away mid-RPM torque to a good dual plane, and you're not making it up. I'm guessing if you looked at the RPM range that cam works best in, it will darn near mirror the range of an RPM. The M1 is gonna start to outshine the RPM at about 6000. His cam is done by then.