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That is a much bigger cam than I'd ever use in a street driven 451 motor. I have a 266/272 cam in my 505 motor that makes about 800 hp and even that is a little too radical of an idle for street use in my mind. If I was driving it on the street I'd probably back my combo down to something in the 260 range. For a 451 I'd drop even more than that.

Try a Comp street roller like a XR292 or XR298. With good heads and good compression you should be 700+ hp and it will still idle halfway decent.



Well after talking with a few places and people, ive decided on the comp cams xr298r grind, the same one you used in the 505 stroker buildup. This will be a lot more street friendly that my cm-1 cam and the R-1 cam i was considering. It should still make great power and run well at the track.