For those who may be interested in this thread, here's the latest. I plugged the oil out port on the Torus fan. The fan came to life and I went on a 30 mile ride. The path was one I have taken many times so I was familiar with how the temp acted. The temp went up to t-stat opening and stayed there. My next step is to disassemble the Vernatherm and see if it's gunked up (from the old engine) or bad a spring. I am beginning to suspect that this heating problem was the cause of the demise of my old engine. Hope this helps anyone with a "creeping" upper heat range situation on their Detroit.