If this problem has been addressed before I'am sorry. I am using a FFR remote oil filter adapter on a 1986 Mustang 302 block. The first time I had a leakage problem was when I changed the oil lines to ones with AN fittings. I over tightened one of the lines going to the block adapter and cracked the adapter. It was during the show season about three years ago. I decided that I did not want to wait for one from FFR., so I bought one with two ports from Summit and did not hook up the oil temperature. This one did not leak at all. Early in 2019 I decided to put an oil thermostat on the oil cooler. While I was doing this I installed new block adapter from FFR in order to have a working oil temperature gauge. Everything was fine for about six months and then it started leaking in the adapter area. I can not tell what piece is leaking. With all this free time right now I decided to check it out. I took the adapter off to inspect it, cannot find any cracks anywhere and the o-ring appears undamaged. I checked for cracks by screwing a spare fitting in the ports to see if they would pull apart. Any ideas from anyone or does any know of a better adapter with three to four ports?