The oil supply line that passes through the water jacket to the pushrod valley and eventually attaches to the oil connector has traditionally been made of copper, since a steel line would rust out and put oil into the coolant. It's a 3/16" diameter tube, which is a bit difficult to find at times. I'm wondering if the dark green colored copper/nickel tubing that's being sold for brake lines would be a suitable substitute? Yes, I know there is a "kit" available from the resto-ripoff places that contains a length of copper tubing and all the associated specialty fittings- - - -I just hate to get bent over by the outrageous prices some of those places charge for common hardware items!
Jerry
