Originally Posted by Frank Reiner

On the left side of the block, at the height of the intermediate gear and its shaft, and slightly behind the plane of the gear, is a lock bolt. That bolt has a dog point that engages a groove in a bushing in which the shaft runs.
The distributor drive shaft is driven by the intermediate shaft. The dist shaft should have threads in its upper end for an extractor bolt.
1) pull dist shaft out of block
2) remove intermediate shaft lock bolt
3) pry inter gear and shaft forward as far as possible
4) put wood or plastic wedges behind inter gear
5) knock inter shaft back into block so that it is clear of gear
6) catch gear as it flies up out of the cavity