I went with a green
Nulon one that matches the Mopar HOAT spec; MS-9769.
I used their green premium long life one. I was going to use the Nulon One, but Supercheap has the Green in a 6L on sale at the moment for ~$32.
5 year vs 10... It'll probably be replaced again before then, anyway.
I followed the instructions from the radiator place. Drain, disconnect heater hose, remove radiator. Fix garden hose to radiator hose & run for ~ 5 minutes. Attach hose to other side & repeat. Blocking various outlets to ensure all old coolant is out. Install radiator & fill with coolant until it pushes out the water & coolant comes out one of the heater ends. Block that end & continue topping up until coolant comes out the other end, to ensure as much water as possible is out, then top up with distilled water.
Start it up, run it for half an hour, let it cool & top up again, to get air out.
Even so, I think there was still tap water in it, as I only put in about 9L of coolant/distilled, and the specs all say 12L.