Hi Guys, I have a 55 2nd series 3100 with a '67 Pontiac 400 in it. Engine starts, runs, drives fine. At about 2500rpm a slight, intermittent, miss starts. I pulled the plugs and they look good. The engine has a slight lope at idle, and then smoothes out till it gets to 2500. Ignition is stock Pontiac with the distributor with the little door. I have a new tuneup kit waiting to install, cap, rotor, points and new wire set. 2500 is about 50 mph in my truck, that's about as fast as I ever drive it, so the miss in not apparent when on the road. It has been doing this ever since I got it back in August, has not changed or abated one lick! Any ideas? Distributor shaft wobble?
