I converted a 1990 Gasser to a Cummins. The Dash Harness is still the 1990 Harness, The Motor And engine wire Harness are out of a 1991.5 D250 so I don’t have a crank sensor.
Is it possible to install a Factory Tach on a 1991.5.
O and just to make some people mad. I found the Tach in a D350 in a LKQ junkyard, someone took the motor and trans but left it behind. Lucky Me..