RFP for the Engine Build for the Missile

I dont place much faith in the sims. Just my own opinion but until you have the engine assembled and running, you simply won't "know". I do own one, but it's not for playing with possible output.

"The use of a dual plane was because of the proven low end torque they produce, where as a single plane is for top end power"
This is a wicked generalization, and for the level and rpm range you want, total bullshit. A modern single plane, with your EFI choice and properly matched cam, with a 4" stroke, will not suffer for lack of torque, but a single plane will limit rpm potential and peak horsepower. And any hydraulic cam will not support what you want in terms of power or rpm potential.