Thinking about getting an autometer tach and thought what in the heck do I need an 8,000 or 10,000 rpm tach. They make a 4,000 or 5,000 low rev tach and was wondering what i should get. '82 K5, stock crate 350, 700R4, NP208, 31" Michelin AT's, 3.08 diffs (uprgrading to 3.73s). I'm pretty much a city/highway boy with a litte off-roading every few months. Two lanes wide, twelve yards long, sixty-five tons of American pride....Canyanero!