My '57 two ton has left hand threads on the drivers side, both front and rear, as HRL said-"L" stamped on the end of the stud.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
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