Agro, that part number at a stab would most likely be early red or blue commodore or something about that era. Don't think it is a WB one (numbers don't line-up), not sure what the Magnum had on it either or if it was a standard 5Lt auto manifold: 92001234, or if they went to the superceded one: 9947175.

Best I can do, don't have a commodore parts book.

Dave.