Rick - Using the info from this Dana/Spicer axle identification guide, it could be a Dana 44. That's just from comparing the rear cover pics with yours, which are a little rounder on the bump out than the 50/60 series axles. The decoding info at the top of the page should be helpful, assuming you can find/read the stampings on your 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)
