Did 12 bolt rear ends only come in Chevelle Super Sports in 1966 or could you order one in a non SS Chevelle. I know most Malibus typically came with a 10 bolt, but I am wondering if the 12 bolt was an option.

I had a '67 Malibu that was a 327 4 speed car with a 12 bolt.

YES, you could get a 12 bolt in a malibu