You need a Catalytic Converter that has good guts inside
Also need an O2 sensor in a STOCK exhaust system
All the breather hoses that manage oil fumes from the engine and oil tank need to be checked.
Last item (I believe) is the carbon canister in the front left fender well, this has all the hoses from the fuel tank and engine that manage gasoline fumes.
If they don't pass you or won't test you

, make an appointment with the DMV smog referee @ Cal State Fullerton.
Get some Xanax too