what would be your diagnosis?????

Marcohotrod said
what spark plugs U runnin and have U tried new ones recently? try looking for electrical zaps when running at night. vacuum of 8 seems low for the xe275/ cam, who is runnin this cam and what is your combo and what are U getting for vacuum. 1 hole at 155 is not the problem

an autolite 3924 is good, and does not know if it is in a mopar or ford or suzuki. misfire is why I asked if U tried another set of new plugs, and have U looked for zapping in the dark, and gap from .040"-.045" is good. what I think is for that cam 8" vacuum is kinda low, was wondering if any other members here are running that cam and would please tell us their combo and vacuum #