Had a friend with a similar problem a few years ago, it turned out to be old gas. It had only been in there a year but it was 10% ethanol, nuff said.
Aside from that I would be suspect too, the centrifugal advance in the distributor, the vacuum advance zeros out at full throttle so it wouldnt be that IMHO
Last edited by sstock; 06/21/2018 3:09 PM.
1953 Chevrolet 3100261 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 GalleryVideo of the 261 running1964 GMC 1000305 Big Block V6, sm420, the next cab off restoration
