Reply to "Screwed in California ... Grey market cars & emissions testing."

Adding the necessary smog equipment will have little or no effect on the performance of the car and will not permanently modify anything that can not be put right back to original. The old bead cats from the early 70s were horrible but the ceramic cats I used flowed better that the GTS mufflers and sounded great.  If you just want to sell the car,  understood but the mods are not that difficult and if some time is spent on a dyno properly jetting the carb and tweaking timing, it will most likely gain power and be clean. I did  this 40 plus times, and the California test we ran at the smog station was , by the owners confession, the cleanest car he had ever tested. I should still have the results in my files and may post them someday.  I do not remember what the CO was but the HC was 7ppm.  I'm not blowing smoke, it's not that bad to make the changes.