Hard to start in the morning, running rich and slooooww...

Drove it all day today, and for the most part it runs well. I noticed the #6 plug is still getting carbon fouled, but the other plugs are a bit lean with a 52 jet. I put in a 56, but haven't had a chance to do a plug read again since. Seems to run better, though.
Currently I have a Standard blue streak cap and rotor on the distributor, and they are relatively new.
I'm still noticing a slight miss at idle, or when the motor is being held at a constant speed at low (>3000rpm) rev. I am chocking it up to the fouled #6 until I replace the plugs.

Thanks again for all your advice, driving the Valiant today was like being in a different car!