Cooling Issue - 1964 Dart GT - 273 with automatic and A/C

Factory gauge. Not puking coolant, but the temp gauge quickly creeps up to the line just before 'H', at which point I find a way to get moving or shut it down.
When any of my vehicles overheat, the first thing I check is the lower radiator hose collapsing. If so, time for a new hose. I don't think inner springs are used any longer. Just a stiffer rubber and over time it softens.