Bud, I subscribe to Antique power magazine. I find it interesting and they cover all makes of tractors including the lesser known classics and orphans. They also publish a separate antique truck magazine as well. They are headquartered not too far from me in Yellow Springs Oh. and put on a tractor show each year. Unfortunately, it is the same week-end as Cubarama.
The major problem is that it is published only six times a year and it is expensive considering the number of issues you get.
By the way, my subscription was a gift from my wife. I guess I must have treated her right.