Hey GL, I wondered where you've been. So you're thinking that line may have been aftermarker, huh? Makes some sense. I had the ENGINE back together, but had already decided to pull the oil pan one more time and put in a new pump, so I'll check a few things while I have the pan off again. If both of the lower holes are returns to the pan as you said, one of those should work for the filter output and I guess I would plug the other. The upper one (marked oil filter intake on my photo) would be for the intake as thought. Right? It is in the oil gallery. I ran a bore brush through the gallery and it's pretty clean. Couldn't get the plug out on the other side of the engine to check that one, but it's probably okay. Haven't been able to run a pressure test yet, but will once I get the new pump in and get ready to put the engine back in. So, if I have this right, I could remove the outside line, cap the hole on the spark plu side where the line went into the head, put a t-connect in at the one marked oil filter intake on my photo, run a line from there to the intake on the filter and use the other part of the t-connect for the oil pressure gauge, and use either of the two holes below for the oil filter outlet and plug the remaining one. Or if it turns out those two don't go into the pan, I could probably take the plug out of the one further forward by the side engine mount holes and use that for the return to the pan. If I have this all right, what I need is a line from the oil gallery to the filter intake and a line from the filter outlet to the oil pan. And it won't affect the oil pressure gauge if the intake to the filter and the connect to the pressure gauge are on the same t connect. Is that the way this should work? And Sixpack, if I'm following you, the main oil gallery threaded hole should be the oil filter intake. When I ran the bore brush through the oil gallery at that location, I got a little bit of carbon type material out and some came out through the threaded hole, so I know this one is threaded into the gallery like you said. I'm getting there, guys. Just have never seen a set-up like this one. Thanks and let me know if I'm on the right track.
