1965 chevy 327; ran fine for last 20 years; started it one day, barely ran, no power like running on 4 cylinders. Changed: electronic ignition, plugs, coil, distributor cap, rotor, fuel filter, fuel tank sock. Checked to make sure timing was in spec. Air filter not blocked (K&N). Still runs like crap; I am out of ideas. Help!!
1965 Corvette 327; standard trans, Edelbrock 600 Performer 4-barrel