I have a 12.5 to 1 comp 440 with full MSD and eddy heads. I just installed new plugs (a real pain in the a$$) and set the gap at .045 is that gap ok? Engine now seem to run very rough until it warms up. Any input.
Stock spec is usually .035 but I don't know what MSD recommends. You should be ok with .045. I like to set them a little narrow for a stock tune up because as the plugs wear the gap increases. Toolman