Vinnie, I only just took notice of this. The car does sound nice and steady.
I see you are using a Pertronix Ignitor II. Do you also have the Flamethrower II coil to go with it?? A Pertronix tech informed me that you will not get the best out of your ignitor II if you don't use a matched coil. I had a III coil on mine and it definitely ran better when I switched to a II.
+1 on the ground wire. It's critical and a good job making one.
This where I'm no expert, but unless your distributor is set up 1 tooth off on the cam gear, (which means nothing as long as the cap is matched to it) your vacuum can is pointing to the retard side. How much total mechanical advance are you getting and how much vacuum advance. Is your car an auto trans or manual. Where is your initial timing set? I say all this because this plagued me for years, not getting optimal timing. Only this year with the help of our friends here, was I able to tackle and learn the distributor curving thing for these cars. Perhaps this has already been gone over in great detail, if so I'm wasting my time typing all this!!
Here is were I'm set at on my '71 351 C 4 V manual. 20 deg. crank ( L10 slot, which I had to weld up and file to dimension) + 14 deg. initial + 3-4 deg. vacuum advance connected to the timed port on a Holley 670. It runs really strong at this, but I could slow the advance down a tad with a spring adjustment to be done later.
Many will say not to use the timed port, but I don't want vacuum advance while at idle with 14 deg. dialed in.
Please accept my apologies if I'm re-hashing this information.