A billet cam is cut from a solid piece of bar stock, which has a linear grain structure and different alloys than a cast or forged cam. A cast cam blank or any casting for that matter has a crystaline grain structure that is susceptible to breaking or cracking. A forged component has a grain structure that follows the shape of the piece being forged. Thus the strength advantage over a cast part (think crankshafts).
Comp does offer billet cams with gears that are compatible with steel distributor gears pressed on.
Hopefully this helps clear it up for you pprince. It is WAY more than a marketing game when it comes to internal engine components. I agree with some of the "billet" street rod parts being hype and marketing.
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No sense in being pessimistic... It won't work anyway
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