[twobjshelbys]

Define the problem you're trying to solve before choosing. If you want fast times from 0-60 (ie, fast response time) you want a supercharger. If you need mid-RPM response go with turbo.

Most of the guys running Ford GTs at the Texas mile are running a combo unit - turbos feeding the supercharger.

I also believe the plumbing system of the turbos will require you to surrender your side pipes. The header exit probably won't fit. Most of the small block 427s also have fairly high compression. These are not compatible with high boost.

I would also assert that you should listen to Bill Cosby's 200 MPH before adding a supercharger or turbocharger to a Cobra. The car in question had twin Paxton superchargers with low to medium boost.

On mine, the 550HP I get from the Roush engine is all the car and I can handle. It's almost too twitchy as it is. I can't imagine it at 750 or 1000...