All I can say is wow I can't believe that these are not available I even looked up one for my 81 and it says unavailable. Its just mind boggling that almost all these trucks are 30+ years old and they still require emissions inspections. They want them off the road is all and for you to fork out $$$ for a new truck.
Will this work?
https://www.ebay.com/itm/Secondary-A...frcectupt=true