> tachometer to work on 4-6-8 cylinders, I believe by changing a resistor. I remember this posting, too, my notes say: Old GM tach: swapping the capacitor: .33 uf for a V-8, .47 for a six, and .68 for a 4 cyl. -- Thomas Stingl ts1 at corvair.de http://corvair.de Karlsruhe, Germany 1961 Rampside - 1962 Monza Wagon - 1963 Corvan ULTRA EuroRep/Ambassador