N 5 N6 or N7, whatever you desire,
The cab roof has a line on the bottom side to cut off for the N5.
Brass or whatever pin you decide to you use to assemble the auger to the combine, and also the feeder house. 3/32 of an inch is the pin for the feeder house, will need to be drilled out for sake of being snug.
The unload auger is 1/16 of an inch.
24.5-32 or 30.5-32 drive tires
steer tires, 11L-16s