dana 44 with discs was introduced in '71. In '77 GM started using the 10 bolt front, but they kept using the D44 for a couple more years, as well. '77 was also the year that the K30 was introduced , with the D60 front.
Chevy's have passenger side drop front axles...only Ford has driver side drop.
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1969 GMC K2500 
1996 Honda Accord
2007 Kawasaki KLR 650
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