E-303 = junk. Idles like crap, falls on it's face in the upper RPMs
B-303 = Kinda quarky but a fairly decent cam. It likes carbs
F-303 = the best of the alphbet cams, IMHO, if you've got the parts to support it
X-303 = Does any body with a serious motor actully run this?
Over all most of the alphabet cams are marginal at best. I'd use one if I could pick up a used one for cheap. But I can't see buying a brand new alphabet cam when there are so many choices that are so much better.
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1987 Buick T-type
1998 HD Electra Elide
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