Ref. my coolant system drawing.
The top portion of the dual tank is 9" tall and the rad cap is extended out from the top because it would hit the deck lid. In the photos the smaller red pipes (1/4" bore) are the overflow from the rad cap housing and the bleed to the radiator. All the other dimensions are the same as the original tank and all the pipes go to the original positions. The bleed to the radiator, which is a Chevy Corvette allloy racing rad, is via a stainless steel tube running parallel to the main coolant tubes.The 5/8" bore tube from the bottom of the top part of the new tank joins to the top of the bottom hose just before the water pump. You can buy a kit from the silicon hose suppliers that allows you to punch a hole in the tube and bolt in an adaptor for the 5/8" bore tube. I have a cover on the top of the tank that I 3d printed to hide the welds. Just fit and fill the system it self bleeds, only half fill the header tank because of expansion. I had mine made in aluminium alloy but you could use the original steel tank sutibly altered.
