My 408 build

If I recall from another thread you said that this was street/strip, but more street correct?

Any which way, I would use the Victor from those 3 intakes....however, better suited for that combo would be the Air-gap (looking at your heads/cam/converter choice) for better low end performance....Also, with that said, you probably won't notice the slight bit of low torque loss using the Victor...the 408's are torquey little dudes.

For what its worth, I have use both the Victor and the Air-gap on a similar combo (410, ported Eddys, 10.8:1, 248/254 cam, ~530hp) and the Air-gap could hang pretty well, but the Victor always made more HP up top (more MPH through the traps on the 1/4 mile). Best on the Air-gap was 10.89 and the Vic was about a tenth quicker (going apples to apples).

Edit: I forgot to mention, I was using an 8" converter (5k stall).