318 Runs like crap

Ok car still running Real Bad. This is what I have done so far

New Plugs
New Leads
New Rotor Button
New Dist Cap
It has a new Carburetor (Reman carter BBD)
Checked voltage at pos coil while cranking and is showing 7.5V (Should this be 12 volt?) or is 7.5 enough for it not to run bad.
Replaced both bad connections at coil
Has good Spark.

This is what I know

When cranking makes a horrible noise sometimes like starter is missing cogs on the flywheel. (not sure its that though)

When I do the timing and aim the light at balancer the timing mark is really erractic and touchy and it is hard to set it correctly. I only have to touch the distributor and the mark moves signicantly.

The car runs really bad surging and shaking but when I get to approx >3500 RPM it seems to smooth out.

Could this be a distributor problem or I'm thinking even a timing chain or EGR Valve. Has anyone had these symptoms. I am running out of things to try and dont want to keep throwing money at things that dont need replacing.