MISSING PARTS!!

Well I can't recall off hand exactly what all is on the back of my cluster. I'm pretty sure though you will have to notch your lower metal insturment housing to fit the large speedo. I'm sure other's know lots more...

The hole on the right is missing the socket for the instrument light. The blank area on the left is where the Constant Voltage regulator mounts, it supplied a regulated voltage (near 5 volts) to the oil pressure, temp, and fuel level gauges. You will need that piece, connecting those gauges to 12 volts will ruin them. Looks like you missing the amp gauge as well.