If this works you'll see a picture of a 330U. the 330 had a 135 cid engine. Hope this helps.

Thanks for the tips but your picture didn't come through however. I tried to give it a shot and have posted a rough picture of the tractor without sheet metal. I am still curious why the larger CID engine on the 300 has less drawbar HP than the 135 CID engine on the 330. The tractor is about 3 hours away so I won't be able to try to identify it until next week.

I'm not sure where you're getting the numbers for your conclusion that the 330U had more drawbar HP. The Nebraska Tractor Test numbers are:

* * * **PTO HP** **Drawbar HP**
model (max) (rated) (max) (rated)
300U: 41.26, 36.41, 37.36, 29.61
330U: 34.24, 29.95, 31.77, 24.31

The 330U compression ratio is higher (7.38 vs 6.8) so it may be a bit more efficient, but the 300U still has the edge in power.

Afraid I'm not good enough to tell you what's in the picture, but certainly could be a 300U - chances are good it is since about ten times as many of them were built as 330Us. Hope you enjoy whichever it is.

My money would be on a 330 or a 340.If it is watch out for the steering box.They are known to be weak