There is no Bendix drive in a modern starter motor, that is after about 1960.
The Bendix drive is a helical shaft and bush that uses the inertia of the starting gear to engage the starter to the ring gear.
Bendix drives went out with straw hats.
All 351C starters i have ever seen use solenoid engagement. It is the contacts in the solenoid that often degrade and fail to apply power to the starters main windings.
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