My 1970 396 L-78 Chevelle has it's original factory installed 4.10 rear still.The car was assembled October 24th,1969,it's CKK 4.10 rear is dated June 1969.Because no other 396 '70 Chevelle came with a 4.10 rearend afterwards,(Different one used for the 454 LS-6),and the L-78 engine was soon discontinued,it's believed they used up old 1969 Chevelle 4.10 stock,stamped KK.
As I came in contact with more 1970 L-78 Chevelles' optioned with a 4.10 over the decades,I realized they too are all dated between June-July 1969.
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