It has a selector switch for 4,6 & 8 cylinders + "12 pole" alt & "none" The terminals are clearly marked "SIG", "ALT" & "GND" and there's a 5/8" hole for a light bulb. It's a 6,000 rpm tach with a 270 degree sweep. Should be easy enough to set up, Unless I'm overlooking something glaringly obvious. I still need a gauge cup for it.
