[2manyT/A'S]

Originally Posted by 'ol Pinion head

Rex, looked at your pics then looked at several bases I have. Your base is from one of the '79 model 301W (4bbl) aircleaners. '79 Pontiac (gasoline) models received the last of the 14" diam aircleaners, only diesels continued on after '79 with 14" diam aircleaners. Your '79 base will measure 16 1/2" across the top of the beaded edge. '80 model T/A's went to a base that was 15 3/16" across the top, & took the smaller diam AC 329C aircleaner. The small snorkel shaped like the one in your pics with the little slots towards the edge was def used on the '79 301 aircleaners. The crankcase vent pipe location is correct for a '79 301 Pontiac & the flat spot in the rear dome of the aircleaner was present in both '79 301 4bbl aircleaners & in the 2bbl version that was stamped for that year. Whether the base originally came from a '79 301 W Bird (with or w/o the T/A lid) or from a '79 301W A-B-G series, can not tell from your pics.

I have an airfilter housing that came off a 79 301 I had about 20 years ago and am pretty sure the carb hole is offset,like the 403 olds.......this changed in 1980,as I recall.....the 301 4bbl. intake was revised.....so the one in question maybe from an 80 301.