[RACER X #99]

The Mustangs are nose heavy to start with, why would you want to make it worse. It seems like a lot of work to impress the gang at the car shows/cruise nights because at the drag strip you ain't gonna impress anybody.
I can certainly understand the FE in the Cobra but today's small blocks ar a much better engine than the early Mustang small blocks and the 400 ci small blocks are FE killers. You also won't have to butcher the car to fit it in.

Good luck anyway.
RD