Let me suggest you drop the oil pan, and visually inspect the fit between the pump and the distributor. If that's not readily visible, try installing the distributor with the pump removed, then install the pump and see if everything fits correctly. There should be a very solid engagement between the distributor shaft and the pump drive.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!