The best suggestion anyone could accept would be to rid youself of any compression fittings being used on nylon flex tubing under the hood of a Cobra. This engineering is absolutely horrible. Not only do they constantly weep, the tube can fracture at the ferrule or lay up against a hot exhaust pipe and you then have a high pressure stream of
oil focused at your headers that could EASILY cause a severe fire as a worst case and make a huge mess otherwise. If you are using mechanical gauges, use a -3 or -4 cloth or steel braided hose and AN fittings. As far as adapting it to the block, the 65-66 Mustangs and others use a 6" long piece of Hex shaped bar stock that had male pipe threads machined on one end and a threaded hole on the other end at a 45 degree angle that will allow small AN nipple to be installed that the hose from the gauge can be attached to. Below is a picture of the mentioned item the line to the gauge. This is sanitary and one of the cleanest ways to do it, and once completed becomes foolproof and can be removed and reattached at will, unlike the before mentioned compression fittings.
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