The modifications you've described will not pass the smog check; they will be considered emissions tampers. You might look into the cost of obtaining the right parts that will fit the replacement engine and see if it's worth the cost.
Also, if the vehicle has not been smog checked by the state's smog check referee's office since the engine change, it will have to be now. California vehicles which have their engine's replaced must be inspected by the smog check referee in order to receive their vehicle registration.
posted by SmogTips Support 10-07-2011 01:32 PM