I started having this today as well on my 49 3600 w/216 and w/1. turns out the #3 and #4 plug wire ends were arcing to the coil mount- causing stumbling. I put insulators over them(and the ends of the plugs and the problem is gone.




1949 Chevy 4400 Big Red
1949 Chevy 3600 Bob's Truck
1949 Chevy 3100 The Investment
1949 Chevy 3800 the Won Ton