I believe it would be possible to fabricate a fixture that bolts into the block instead of the distributor to guide a chucking reamer the diameter of the oil pump housing. That would align the distributor housing and the oil pump so the pump can be driven properly by the distributor. The pump is secured to the bracket by a single setscrew and a jam nut, which was probably overtightened to cause the original problem.
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!