It looks like the Eaton axle to me. The seal # is probably 2081 in the National brand. The parts book won,t show it as Eaton. It will list it as except Dana. Practically all 20-30 series trucks up to 73 use this system.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne Super In the Gallery Forum
