Nick, Your rear axle code (considering the idea that it is a 1948-50 axle based on the measurement) should be stamped as indicated in the pic below. An earlier axle will have the numbers in a different location (top of the differential pumpkin on the forward snout area) as shown in the 2nd pic. The 2-letter code will help confirm the year/application of the axle.
~ Dan 1951 Chevy 3 window 3100 Follow this story in the DITY Gallery "My Grandpa Carl's Truck and How it Became Mine" 1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
