I didn't bother welding in the bung because it runs so nice. I will do a mileage test when I bring it out in the spring and report back.
If you dont have drivability problems I wouldn't bother either. But if you have a problem you cant figure out, I have a wideband you can use in the future.

Last edited by sstock; 02/02/2020 10:49 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