Thanks all.
Good thoughts.
The pulley is a double wide - I am using the closest to the block for the alternator/flywheel.
Bartamos & HRL: The center hole SEEMS to be pretty dang tight.
The bolt pattern (4) is good and fits in any position.
(The fan is separate from the pulley.)
The water pump fits perfectly and was the TBC 366 match from my service book.
Maybe the pulley was bent/damaged?
Maybe that's why the water pump failed??
More questions than answers, sigh.
;-) Big Bolts - gotta love em!