Whenever I start one that isn't in the car, or one that is but doesn't have the front end or a radiator in it, I use this simple setup. You can literally adjust the temperature by simply adjusting the PVC valve on the lower hose.
Bill, where does the upper hose/pvc terminate to? Atmosphere or a tank? Great looking set up! :TU: George
Check to make sure the lifter is spinning in the bore too. It has to spin while the engine is running on a flat tappet cam.