I had found a tractor data website some time ago. Danged if I can find it tonight. IIRC, you put in manufacturer and model, and it would say specs on tractor, years made, etc.
Anyway, I'm trying to learn about an International 3514. I just ordered manuals for a 3414 on eBay by mistake. Julie spotted my error immediately. Very likely, these two models are just an engine size thing.