[quote=muscletruck7379;13270142]did you just call me old? or vice-versa?[/quote

does it have any bearing

engine at cruise, under no load, has it's highest intake +vacuum only if and when the engine is operating at optimum level- achieved only in these later years when manufacturers found out the buyer was more concerned with mileage over power- vacuum gauge will tell any driver where and how better fuel economy can be found- very few care to see it