1966 should be oil bath air cleaner and canister oil filter. Siamese port head cast Iron intake and carter carburetor.
Carter? Why does the parts manual show an Aisin? Mine "came with" a single barrel Aisin. Also, what was the production date of your rig? If mine is exactly as in the '67 parts manual, it would be really odd that someone put in an engine from ONE year later. Then again, ive seen other stranger things, like a Chevy bolt pattern T18 transmission case from a school bus, of all things.
Another question: when a parts manual came out, was it for that year or the year before, etc? That is, would my 1967 parts manual be for the 66 production year, 66 sales year, 67 production year, 67 sales year, or maybe it was for the 68 production/sales???? Anyone know the answer to that??