Another bolter mentioned this in another thread:
"After stuffing the under dash portion of the harness through the firewall (from the under hood side) it became apparent that the proper way to hook up the gauges and ignition was with them sitting on the floor board. You can easily connect everything. This is before the under hood stuff, such as voltage regulator are connected, so that you have enough slack in the harness to drop the gauges to the floor. Then you mount the gauges to the dash, with the speedometer and cluster each requiring 4 nuts. I learned I could mount them blindly by sitting in the driver's seat and reach under the dash, using a socket extension with appropriate socket. This way you don't have to torture your body."
Sounds better than doing it the hard way. Disconnect the battery and don't put any power to anything until you have ohmed each wire end to end. If you need help learning to use your meter, there are plenty of us here that can help.
