Dean, According to the temp guage and me not noticing any steam or overflow seepage, there were no issues overheating. I did notice a small leak in the rad coil but never lost enough antifreeze to require adding any.
Soundguy, I tend to agree with you on the air flow assessment although I know it can make a huge difference in a 2 cycle engine. A completely different animal but it's part of why I asked this question.
I was very careful when putting the gaskets in for the manifold and carb as I know that can be an issue, so I'm confident there's not an issue there.
I do have a heat temp gun but had not even thought about looking for hot spots. That's a great suggestion and I will do that.
After looking at the radiator closely, I'm starting to think that's the prob. Now I just hope they can fix it.
Thanks again guys. This is my first foray into an old tractor so I'm soaking up your knowledge like a sponge. Hopefully, one day I will be able to help someone else.