Usable power for the street?

For what it's worth (last comment on this) the test where the guy compared a JY 5.9 with the BB intake and EFI to the 300hp crate motor with a dual plane and 4 bbl is partly why I think the real bottle neck is the cam. I always thought the 300hp crate motor gained 55hp (rated values) because of the intake. It was the big difference between a 5.9 in a Ram and the crate motor. After he ran them both and got darn near the exact same numbers, I started to think the intake had little to do with the HP they made. I think it is all in the really small cam.

Note too that it was 300hp with no water pump, PS pump, AC, air cleaner or full exhaust. So in the car, they both probably made closer to 250 hp.