There is a VIN number on the front framerail, just in front of the crossmember, this will tell you what year your chassis is-although many have had rears swapped etc over 40+ yrs. Eaton lockers are still out there, I just sold one about 2 mos ago. Brian


My \'64\'s in the Gallery
Pictures in my Photobucket
1964 C10 Custom Cab 350/700R4
1964 Suburban 350/700R4
1979 Ford F350 4x4 400/c6