The Eton Detroit Spring for $350 is the original 1949 8 leaf two stage (5-3) spring with a rate of 365 and a 3 ¾” arch (22-166). If the St. Louis Spring is the same I would buy it. It’s probably the 8 leaf spring with a rate of 315 and a 3 ½” arch (22-184). That is the spring they sell today for the 1947-1955 ½ and ¾ ton truck.
Try
General Spring front 22-184 $149 and the rear 7(4/3) 22-173 $224.
