For the drive shaft, pn 302545 the skf number is 6904
For the prop shaft, pn 302564, the skf number is 7533
I carry the full seal kit if you need it all at myoldboatmotor.com for $22.45
This includes the ds seal, ps seal, shift rod o ring, 2 nylon crush washers for drain/vent screws, o ring for prop shaft housing, upper drive shaft o ring, small o ring for shift rod Phillips screw, and of course the spaghetti seal.
I am trying to figure out a way to add little tubes of 3M 847 to the kits as well, but currently that is not included.