I have been asked how I did the cooling system, the short of it is that I am still fabricating the coolant system. I emulated the work done by Peter Sullivan and his EJ25 conversion of his 912. The coolant lines are wire-reinforced marine grad hose ran through the heater channels and then into the frunk. I am using a very thick but short radiator instead the typical large radiator tilted.
Here is Mr. Sullivan very well done 912 conversion (I think has been on this board before):
https://get.google.com/albumarchive/102497299695954962887/album/AF1QipNmZw5yqysBS5sIr5RZmGGapUTlh8jTw7qncX_F