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Reply to "Duraspark vs MSD distributor"

Were you aware MSD made distributors other than the one you chose. In the case of the 351C MSD #8477 or #8577 are both 100% billet, no plastic, and they are compact. 8477 has vacuum advance (see picture), 8577 is strictly centrifugal advance. The same distributors are made for the 302: #8479 and #8579.

Bronze distributor gears are for drag racing, they were never meant to last, roller cams ground on steel cores must be mated to steel gears if longevity is the goal. It did take some cam grinders a while to understand this. There was a period of time when the aftermarket was pushing those bronze gears on people who purchased roller cams for applications other than drag racing, some even made promises of longevity, which was bull. The reduction of ZDDP in motor oil didn't help either. Distributor gears need ZDDP. Those promises and all the gear failures lead to a lot of confusion among the end users. That was all resolved once Crane began selling the steel gears. It sounds like these problems you experienced occurred several years ago, before Crane started manufacturing the steel gears. Sorry you got stung by that situation.

-G

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