On board diagnostics 1 = old guy driving while not watching the road.
at 71 I’ve never had a carburetor not do what the screw driver, vacuum gage, dwell meter and an O2 hand held meter , timing light instructed it to do.
I’m here to learn , with my cat tuner and data cat tools to conquer the OBD1 in my 1993 Chevy k1500 5.0 with a cam duration of 223 intake an exhaust it’s similar to the old 3863151 Chevy cam , yeah old reliable.
