I just got a 1978 class c motorhome.Ford 460. What is required for california smog, I don't think this thing even has cats. Egr? Can I change the carb and put some headers on it? I doubt it.

It originally had a CAT unless there is a special exemption since it is a motorhome.

Maybe not! My 1979 F350 is classified as a ton truck and was therefore smog exempt. It had NO cats or smop pump from the factory. It even has that info on the factory sticker on the valve covers.

Maybe not! My 1979 F350 is classified as a ton truck and was therefore smog exempt. It had NO cats or smop pump from the factory. It even has that info on the factory sticker on the valve covers.

^...what he said. In CA those years smog equipment was determined by gvw. My dad bought a '79 F-350 4x4 400 new specifically because it had no cat or air pump. It was obviously a commercial vehicle, I don't know if the exemption applied to a motor home.

i think in 78 only half ton trucks got emisions equip.

So does that mean that i can pump this thing up a little and not have the smog man pissed at me?:D

Yes you can... A set of headers, a straight up timing chain, and mess with timing/jetting...

Thanks!!