I finally got a chance to drive the LJ after the coolant system update. Happy to report all is well and there are no issues/leaks. I'm not happy to report I'm an idiot. The A/C wasn't working, so I broke out the gauges to check the system. After a little bit of trouble shooting, I discovered that I had neglected to plug back in the connector for the clutch cycling switch that goes into the accumulator drier. I had removed the connector when replacing the heater hoses, due to needing better access to the spring clamps.
Apparently, now I have an issue with the backup camera. Every time I press on the brakes, the backup camera comes on. As soon as I get off the brakes, the camera goes out. More trouble shooting time!