I'm still working on this car.
I have duty cycle readings hovering between 42.5 - 54.6 a vacuum gauge that reads a steady 15 in. This is all at idle. As soon as I increase the revs I get black smoke out the back of the car. Today I hooked a fuel pressure gauge to the cold start outlet of the fuel distributor and got a reading of 80psi. I do not have a CIS fuel pressure gauge set so I don't know if this reading has any validity. I can't drive this car anywhere because once I have traveled 10 miles the plugs are sooted up and she will barely pull away. I'm baffled. Changed the fuel dist. and idle valve for used units absolutely no change. Went back to the old units, no change. New 02 sensor, no change. Cap and rotor, no change. I'm on my 4th set of plugs all different makes, no change. I can't get non resistor anywhere so I'm using NGK. All compressions around 155 hot/warm engine. Valve stem seals changed, no change.

Is there anyone out there that can point me in a new direction?

Michael