I bought my 72 in July 2015. I have been working on little things one at a time. Thermostat housing (chrome) started to leak, turns out the threads were striped out of the intake. Drill, Tap and Heli-coil it, trashed chrome housing, installed a new cast iron housing, installed all new hoses and belts. No leaks at all. Just goes to prove a blind squirrel can find a nut sometimes!!