Heater, '33 Packard?

Posted by RussBees On 2011/10/13 9:28:57

Questions on installing a first time heater on a '33 1002. We see a threaded plug on top of the head between spark-plugs #5 & 6. Is that the "supply" for the heater location? And if so what is the hardware at that spot and where available. If the plug has never been removed we wonder at the difficulty in removing it. Then....where is the location and how is it done to return the fluid to the radiator? Thanks for everyone's help. Russ