[mssl72]

From the digging around I've done over the years, the '65 L78 air cleaner was the same as the '66 L72 air cleaner on full size cars for those 2 years. Just the cubic inch decal was different. The 1965 assembly manual showed the same part number #6421970. I have never confirmed the part number for a Z16 car air cleaner. I would suspect it was different because the lid was chrome, but I would also guess that the Z16 base was the same. Of all the air cleaners I've seen, I've only seen one with the "level ride" vacuum fitting. The picture SuperNovaSS posted is correct for a '66 L72 full size car.