Very Rare GM ORIGINAL 1966 Chevy II L79 12 bolt rear differential housing 3852980N cast D-1-6 . Build code BQ 0502 G . Housing is in good shape and includes the brake backing plates ,rear inspection cover with bolts . The housing is 52 1/4 inches wide measured from the brake backing plate outside edge . The housing you see in pictures is what you will receive . Housing has been in storage for over 35 years is sold as is no warranty no guarantee no return sale final.