The car's primary gages are contained within a single round instrument binnacle - similar to the hot rods of the era.
This way the body stores up energy and with breakfast the following morning, biker's fuel gages should be on almost full.
Gages can be filled with a variety of fluids including glycerin, mineral oil and silicone oil.
In the lower seams mandrills were sometimes used as gages to measure the length for wooden props.
Suitable gages have been made, although I rely more heavily on my digital micrometer than the track gage.