Hey John T - you are correct about the two resistors' configuration!
The field resistor is a flat wound affair wound onto a flat, bakelite(?) bobbin/terminal assembly.
The headlight dimmer OTOH is a half-dozen or so loops of heavier wire in a self-supporting coil configuration. Further, from the factory the dimmer coil was originally wrapped in (gasp!) asbestos insulation - which is usually long gone 60 years later.
Regarding field resistance values and wattages I know a #194 lamp (4 - 5 ohms) will work as a substitute resistor because in a jam I tried it once! It'll cause the generator to max out at 3 - 4 amps - enough to fire the ignition and leave an amp or two left over to float charge the battery (ideal for long runs in hot weather).
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Today's Featured Article - Memories of an IH Super A When I was ? up to 10, I worked on my Papaw's farm in Greeneville, TN every summer. As I grew older (7), it was the thrill of my day to ride or drive on the tractor. My Papaw had a 1954 IH Super A that he bought to replace a Cub. My Papaw raised "baccer" (tobacco) and corn with the Super A, but the fondest memory was of the sawmill. He owned a small sawmill for sawing "baccer" sticks. The Super A was the powerplant. When I was old enough (7 or 8), I would get up early and be dressed to
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