If it is timing, it is just another example of how many carbs have been rebuilt because of ignition problems. Always start with the basics first when one obtains a new/old vehicle. Dont take for granted point gap, spark plugs/valve adjustment and ignition timing, do the easy non invasive things first then ramp up your diagnostics after that.
My .02 only.
Steve

Last edited by sstock; 08/27/2019 10:40 PM.

1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
In the DITY Gallery
Video of the 261 running

1964 GMC 1000
305 Big Block V6, sm420, the next cab off restoration