HI...we have seen some trucks with a vacuum gauge installed in the gauge cluster. Does this cause one to drive differently? What are the merits? We use a vacuum gauge at tune-up/timing on the 235 but never have thought of having one in the dash. Were they ever a standard item on any cars/trucks? I would like to hear from anyone that has one and what are its merits. We are thinking of buying one. Thanks, Steve
