318 Poly Vibration

Set #1 tdc compression, removed valve cover to make sure, set distributor/rotor to #1, cleaned up cap and rotor, checked/cleaned up coil wires, checked all plug wires are clicked on all the way.

Started, let warm up, advanced timing to 10dg btdc, set idle to about 700 rpm, checked timing reset to 10dg, ended up running best at around 12-13dg.
Set idle mixture using vacuum gauge hooked to manifold vacuum on carb.
Checked idle in drive and reverse.
Double checked timing, tightened up distributor, took for a ride.

Runs good, not much different than last time, a little more advanced.

Vibration is more obvious, if that is the correct term, seems more prevalent at the right front, passenger side.

Changed coil to the exact same coil, brand new coil I just received for another car, no difference.

It has a clear fuel filter, full of gas, had checked floats and needle/seat last time. Checked water pump, alternator, power steering pump, again, no issues.

Checked and changed everything, fixed a tranny leak at the kickdown, put new floor mats in, nothing!

Could it be the fuel pump? Put a big long screwdriver to it, not vibrating or knocking.

I was holding a small long screwdriver leaning on the passenger fender and noticed the upper horn vibrating, then I noticed the screwdriver in my hand vibrating at the same frequency.

I can't find anyone, professional or otherwise, who can either take the time to work on an old car, can figure out the issue, or even believe there is an issue.

The facts remain, ran great, then wanted to die, then slight vibration that was never there for 3 months, then runs good, then not within an hour, but vibration remains constant.

I'm not stupid, or crazy. I'm completely stumped. Too bad, nice car otherwise.