Those won't fit, good luck modifying the entire faceplate if you do decide to use them.
I have looked at the specs, and JEBar did get me a general measurement is how I know they won't work.
I have found a suitable replacement that will take over the 2 round Elgin "gauges"
But I'm not going to share until I get the measurements I need; those are the Exact diameter of the Elgin "circle"
Use this; it's already programmed for cars, and it's free.Simply use "Torque" app and a $11 Bluetooth OBDII adapter... you can customize the gauges however you like.
VDO Instrumentation App | VDO Instruments and Accessories