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I Want To Know If My 1978 Came With Catayltic Converters And How I Can Figure It Out With Out To Oem Stickers And How I Can Convince The Dmv That It Didn't Come With Them Thats If It Didnt Come With It Please Some One Let Me Know Thanks
Not anywhere - only on the fuel gauge on the instrument panel where you read how much gas is in the tank. If it does say 'UNLEADED FUEL ONLY', it came with the cats from factory. If it doesn't, cats were not installed at the factory.
If it is small it means it accommodated the unleaded fuel pump nozzle and had a CC.
If it is large and could accept the Leaded fuel nozzle and wouldn't have a CC
That's a good one, but not that reliable.
It could be punched out easily. My 79 was supposed to have the unleaded filler, but someone punched it out to accept the regular filler. It looks like it was never there.