That would explain the lean pop when you blip the throtte but at sustained higher speeds you are on the main metering jet. If it is a rochester carb, I had to run a jet size richer because of the 10 percent alcohol that they are putting in the gasoline these days. It would buck at highway speeds otherwise.


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