Rootus
Officially Addicted
Well, the distributor is turned via a gear by the camshaft, and it is attached to the driveshaft for the oil pump. In your situation I would verify the rotor itself is not obviously broken (it pulls right off). And if it looks okay I'd pull the distributor and have a look at it, the shaft, the gear, and then down the hole at the oil pump shaft. By this point I expect you'll have found evidence of what is wrong. Hopefully nothing too painful, like a seized oil pump...
Dave
Dave