Yes and no. The Nova rear end will be multi leaf. Your 67 Camaro could be multi or mono. If it is mono leaf in your car, you'll need the conversion kit to install the Nova rear end. If yours is multi then it'll bolt right in.
Not likely. Because of the body style change between 1992 and 1993 (3rd generation to 4th generation), it is unlikely that the rear end will fit due to the difference in fender sizes and other specifications.