[Wally Arntzen]

When we did mine we did not remove the A/C or anything else to remove and install them.
You should be able to get at them out with the right wrench and feel your way through to get the new ones started.
When you get them installed before you drop the coach soap all of the tanks down and look for leaks at the welds especially on the ends. Two of mine had leaks and we had to replace them. The small tank for the toilet installed in the wheel well also had leaks in the welds.