Found an old receipt from Superior Automotive from back in the day. 2005?
The advertised a dyno "tune" for $180, they put my car on the dyno, checked the timing at idle
and ran it. Told me my air to fuel ratio was dangerously low. I asked if they would be swapping out the jets and running it again, they reply "No, if you want me to open up your carburetor it will be another $300 minimum."
$480 for a jet change... nice. If that had happened to me today... oh boy, it would not have gone down the same. Anyways, beware.