You are correct. You'll need to find a new motor with all the emissions
parts which belong to it. After the swap is complete, your GMC S15 will have
to be inspected by a California State Referee. The Referee will ensure that
the job was done properly and that the new engine does not pollute. If all
is well they will issue you a BAR label which will be placed somewhere on
your vehicles chassis which will be an indication that the vehicle is California smog legal.
posted by SmogTips Support