radiator

I have a whole thread about the details so I won't repeat it all here, but I did want to make a quick warning about the Superior Aluminum Radiator that some of the GMC shops sell. I'm sure it's worked out fine for plenty of folks, but mine cost me months of headaches, and hundreds of dollars...

I would like to install some valves to easily shut off the flow of coolant to the water heater in the back of the coach (similar to the valves we use to shut off flow to the heater core). Does anyone know off the top of their heads the diameters of those two hoses. I can take some calipers out...

Does anyone know how high the coach needs to be lifted in the front in order to drop the radiator? I am considering installing an aluminum replacement at some point in the future. The PO already updated the radiator mount so that it can be dropped easily from the bottom of the coach.