I had not heard of the tires, but did a google and found a link.
www.stausaonline.com/light-truck/index.html


Joe
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'67 Chevy C20 fleetside, 250 inline, 3 on tree, heavy duty clutch and brakes, heater, steel bed floor
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"Tighten until the stud snaps, then back off half a turn."