1978 Chevrolet C10 Half Ton federal truck has modified engine.

Hello I have inherited a the vehicle listed above. The engine has been modified by the previous owner and now it is due for a smog test. I don't know what all was done internally but I suspect it has a pretty aggressive cam and the intake manifold is not stock or CA legal. Being a federal truck does it still require CA legal parts to pass the smog test even if it Burns clean on the gas analyzer test?


Answer:		Any modification done to your 1978 Chevy truck will be considered an emissions tamper as far as the California smog check is concerned, regardless of it burning clean or being a federal truck. The engine will have to be rebuild to stock before it can pass the smog test. posted by SmogTips Support

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