Ooh, that's not good. The line for the original gauge ended in a bulb that went in the head on the left rear corner. The bulb and line were filled with ether. Since the line has been cut, you would be looking at replacng the line and refilling it, not many places do that anymore. You might consider checking out some of the aftermarket gauges, I have seen stock style clusters that are setup internally with modern 12 volt electrics so that they'll work with a later model engine. I beleve the gauges themselves are available separately, so that they can be installed in the original housing. If it still has the stock 30 psi oil pressure gauge, you might consider putting in the 60 psi conversion gauge as well.
