67 dart emissions

Purple Haze said

I can tell you from experience that if you take it to a shop they will set it up to pass take it through for you and when they come back set everything back where it was and not tell you anything. I found that with my old F250 the timing had to be set at factory specs and the carb leaned. If you take it to a shop take it somewhere were they will tell you how to set it up or you will be paying $100 every year. Where in AZ are you, may be able to help.

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Maybe that's because it won't run the same way tuned for emissions as the way you had it tuned before & they didn't want to hear complaints about why it didn't run the same when you picked it up.

It's pretty simple. Find out what your initial timing was at, count the # of turns the mixture screws were set to, make the adjustments to pass & then afterwards just go back & readjust the timing & mixture to where it was if that's how you liked it. If it's more involved then that you will need a qualified technician to work on it.