Hi Gary
They should all be New Departure Bearings and the numbers are still active. Most bearing supply houses should be able to help you. I use
https://www.motionindustries.com/mot...mii/index.html they generally ship within 24 hours most bearings are less expensive through them then through the auto parts store. Find your local dealer on there web site.
Think the only bearing that is not readily available is main shaft pilot which places like
http://www.obschevy.com/ have almost everything.
Cheers Phil