The only modifications I made to my Pantera are:
- a "simple" cap on the swirl tank, that is to say it leaves the upper outlet free with the small pipe which goes to the bottom of the expansion tank
- the temperature probe directly on the block.
- A Flowkooler water pump
- A 16'' fan added behind the radiator
The expansion tank cap is rated at 18 PSI I think. There was originally a small +/- 1/4" pipe that connects the top of the radiator to the large return tube to the pump, I obviously kept it.
The thermostat is a Robertshaw purchased from Summit.
The small outlet on the top of the block and the small inlet on the pump are connected to the radiator of the cabin heating system
So far I have only tried stopping with the engine idling or fast idling and it works great. I can clearly see the temperature rising then when it reaches 180°F it drops suddenly before rising gradually, at this moment the motor outlet tube becomes hot and a few seconds later the large outlet tube of the swirl tank also heats up, the radiator then begins to heat gradually until the fans come on. I know the system degasses automatically because I have to add a little fluid to the expansion tank when the engine has cooled down after the first warm-up.