I hope to use AN hose through the orig heating air ducts. Two east coast race shops have done this w success.
Will fabricate Alum tubes up to the hose on both sides. Just bought a factory overflow tank to locate in Rear Left corner. Will make up an Alum line from there to the hose going thru the duct on the left side. Probably do something similar on the right.
The unknown is up front. It looks like Porsche runs their (3) radiators in parallel, I presume so they each cool evenly. This where it gets complicated. Two main lines branch into three lines to and from the 3 radiators.
The center rad has only 19mm dia inlets, both at the bottom w a bleeder vent at the top.
Have pulled all the gear from both front fenders and it looks like adequate room for the rads plus their fans. Would like to use midget car or sprint car radiators there. They even have similar small dia hoses.
It really would be easier to use one center rad like the V8 guys do. However, if the (3) parallel rads work I won't have to cut a big hole in the nose or shorten the gas tank. Thats a big plus.
Len