After that, I decided to see if I could lessen the oil consumption/smoking problem. I had ordered some new valve seals and a valve cover gasket, because replacing the seals would be a quick job. Unfortunately, I found a problem larger than seals, but it did explain the #4 excessive consumption, so I guess that's good.
When I popped the valve cover off, I noticed a ring dangling on the #4 intake rocker. Strange. I removed the rocker set and then looked things over some more and that's when I noticed that the #4 intake valve spring retainer looked strange.
Here's what the #3 intake valve spring retainer looks like.
I looked at the parts manual and figured it out.

The #4 intake valve spring retainer had broken and all that was holding the valve up was the oil guard underneath what was left of the retainer. And this had pinched the valve seal, which was why I was getting more oil in that cylinder. I got in touch with the place that got me the oil pump and they think they have a retainer, but they haven't found it yet. I'm hoping they find one so I can get some more work done this weekend. In the meantime, I replaced the seals on cylinders 1 and 2 and have 3 and 4 disassembled. If the tractor place can't find a retainer, I may try welding a flange on this broken one to get me by....not sure. I sure wish I had a lathe because it's a pretty simple part and I'm sure I could just make a replacement.
Here's the video I took to explain to them the odd part failure I saw. It helps to explain things.