318 Engine stumble

The plugs are champion. I didn't know the part number.
I remember gapping them to 35

I took them out and sanded the tips not too long ago and cleaned them up. They are not new. 7 years old with less than 100 miles on them.

I'm going to pull the plugs and regap them.
Also check the part number on them to make sure they are right.

Might be a few days but I'll get to it eventually