[Grant Bowker]

There was at least one more maker of governors that were used on period Chevrolets - King Seeley.
Based on the attached page (from an ebay listing) it appears that King Seeley provided governors to Chevrolet for the "official" installations, with both King Seeley and Chevrolet part numbers listed.


On edit: an earlier edition of the Master Parts Catalog also lists the Monarch model "S" governor as fitting 1934-1936 Chevrolets so there were at least three makers of governors for Chevrolets.


The GMC 302 cubic inch engine used in the M135/211 series also had a governor on its Holley carburretor. The TM says the engine governor was also a Holley product. There's also a listing for a Zenith "Mechanovac" that was used on trucks with PTO (fuel and water tankers) that provided engine speed regulation separate from the normal governor.



On the M135 the governor could be used as a crude cruise control. Pull out the throttle contol until the governor limited the engine speed at a speed of about 58 mph on the level. Compared to proper cruise controls, this had the unfortunate limitation that if you needed to stop in a hurry, you had to be just as fast to disengage the throttle manually to avoid fighting full power with the brakes.