my grandfather has an 84' f150 with the 302 and auto trans (not sure which one i can look at it if you need to know). completely stock. It will run/ idle fine when its not in gear but as soon as he puts it in gear it bogs down and it will quit if he doesn't keep the pedal just about on the floor.. he thinks it has a miss. gonna try to check it out today any ideas what to look for?