Building a Dirt Track Car

I was hopping someone with dirt track experience would have an idea of the horsepower needed to run around 15 second 4/10 mile laps with a 3000lbs car. I don't think there are any calculators to determine that like there are for drag racing.

TrailBeast said

I have a brand new small block Mopar Purple flat track cam when you are ready for it. :D

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What is the part number for the cam? This track I'm planning on running at has "high" banks.