Paul -
44 years old put that dryer in a limbo in time where it could be the old belt-drive blower design, or the fixed bulkhead design, as least that applies here in the U.S.
I know availability has not always been the same in Canada as the U.S. on certain WP designs, but if your dryer has the fixed bulkhead and direct-drive blower, then I wouldn't be too concerned about a motor, at least not as mechanically capable as you are. The older design with the belt-drive blower might pose more of a problem finding a good motor.
Which style is your dryer?
Gordon