… In California, NO Smog Check if You Register Your Vehicle as a 'Historic Vehicle', 25 Years or Older! But!! Your Driving is Limited, to a Degree. At the first, it cost Me $40 (2001). My 2019 Tags were $108.
P.S. What You can also do, is: Take off the Big Carb and Aftermarket Manifold, put the Stock Manifold and Carb (or a 600 cfm Vac. Sec. Holley or a Stock Motorcraft Carb) Back On...Re-Tune to Pass the Smog Inspection; when passed, put All the HP Parts Back On and Re-Tune!