I replaced the O-rings on my 1993 Cherokee but a T-60 wouldn't fit. I had to use a 9/16's hex. I did the same thing of removing the hex from the socket. Used a 9/16's wrench on the end and a short cheater bar. I also removed the carbon canister and windshield washer tank. Didn't have any problems removing the filter adapter from the top.
Gonna do the same job on my 98 xj. I ordered the big L wrench on Amazon. Also will use cheater bar. Wanted to ask you how tight you went on the bolt. It's a thick bolt so i guess it's ok to use good force?
It can handle a bit of force. I tightened mine with almost the same force as it took getting it broke loose. Make sure your torx bit is tight and fits snug.