The Hour meter was installed By Dave's Father,who was a Truck driver by trade,and was all about monitoring his vehicles this way.I believe the metal clip he used to hold down the engine block heater plug is the same one used on the rarely seen Dual Snorkles PCV hose.
This father & Son team was the truly the REAL deal,and I was saddened to hear of Daves Father passing.
SuperChevy did share a picture of the two of them together with the Nova in the February 99 issue.
A good Guy who really knew his stuff!