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If you get the proper ignition timing in the motor, manifold vacuum will improve. The cam is not that radical, so you will not have to drill the primary throttle blades. Stop lookin' all over the net...

I'm going to give you some of the same info that I gave another rodder recently, but first off, let's identify the cam for other CHR members who are following along. I'm thinkin' it's a MC2203 with a...

Holley 108-12, Holley Carburetor Service Gaskets | Holley

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