Hey, if anyone is interested I have scanned the manuals that came with my 1949 Allis-Chalmers Model G tractor... I'd be happy to make them available to anyone in PDF format on request. They're kind of grease-stained, but that's authentic, right? Here is the list of what I've got:

Model G Operators/Parts Manual
Model G Front Mounted Plow
Model No. 4 Power Mower (sickle bar mower)
Model G Master Tool Carrier (cultivator mounting bar)

Shoot me a message through my member info, and I'll get back to you with a download link.