John, figured I just needed some more elbow in it. Always best to ask first. Having it apart now, I see how the spacer floats with the axle removed.
Steve, thanks for the Manual link. I've never seen those, always used the Maintenance Manual. Sweet, descriptive, and detailed photos.
I can't believe I never stumbled across that before. I can see myself spending many hours in there.
My son steered me to YouTube and I used the method in the clip I attached.
https://www.youtube.com/watch?v=F7Y6MKTpW70A quick run to HD, under $3.00 and I was moving along with my task in under an hour. The method worked like a champ. As soon as I watched it, I thought that is just ingenious.
5/8" worked for the front axle on my year H1. If I use a different size for the rear, I'll edit and post that too.
Thanks for the speedy replies on this holiday weekend. Hopefully it helps someone down the road.