Okay, let us back up.
Did you check the ignition timing? If you did, what did you set it at and did you adjust it with the vacuum advance disconnected?
Did you check the compression on at least 1 cylinder?
The other thing would be the exhaust. Did you either drop the head pipe and road test or remove the O2 sensor to see if the performance improves?
Does the transmission shift through all the gears?
Roy
Tuesday, September 24th, 2019 AT 6:49 PM