[bobcowan]

I'll be using a 11-14 engine,because I also want an automatic transmission. The older engines are not forged, so you have to be a little more careful with boost. But still a boat load of power for a small'ish investment. I figure my complete drive line will be <$15K.

I think the standard exhaust from most kit makers is kind of a limiting factor - especially with big displacement and naturally aspirated. FI will extend that limit a little bit, but it's still a limitation. You can build a 1,000 hp Coyote engine, but I think it would be difficult with a standard Cobra kit exhaust.