According to my Wagner parts catalog, this is for use on the Lower Rear Position on both the left and right wheels of:
- DODGE TRUCKS (1958: Series 400; LD, LP, and LS)
- DODGE TRUCKS (1958: Series 600; LT (6 wheel, rear tandem traction))
car auto automobile automotive classic braking system commercial delivery utility pickup pick-up 58 (CABINET K, SLOT 8)