Ok, I just took a count of a standard Pontiac distributor gear teeth = 14. I took a count of a extra SD455 distributor it has 15 teeth. Also checked it against a NOS SD455 gear part # 801318 it has 15 teeth. The Number of teeth on a regular Pontiac cam is 14. The number of teeth on a SD cam is 15. Hope this helps in some way.
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