I went out for a little while this morning and installed a new u-joint in my front driveshaft and got it installed in the XJ. I also changed the oil and filter with fresh stuff now that I had oil pressure.
I fired it up and let it idle for a bit. It sounds quieter than it used to and the oil pressure looked good and consistent. Now to drive it some so I can feel comfortable.
Also I have started disassembling and checking over a Renix 4.0L engine to rebuild. Starting to gather parts to do a simple stock rebuild on it. I can use my new book!