Compliments Riley Harshman the Owner of the Jeep and who provided the information, check out his WAYALIFE Thread “Birth of Phoenix”
The main question you have to ask yourself when researching this swap, “Do you go with a Fuel cell, aftermarket tank or do the TJ fuel tank swap?”
A Fuel Cell takes up needed space in the cargo area. Aftermarket tanks can cost up to like $2000 or something like that so the decision was made to do the TJ fuel tank option. After more research, if you use the 2005-2006 tank then you can hook up all the emissions and have no Check Engine Light (CEL) (if that even matters to you). Also it’s a 19 gal tank and you use the JK pump. Looked easy enough, so here we go.
The TJ Fill neck points right towards the fuel door. Hardest part will be modifying the JK fill neck.
A beefier skid plate will be later. The TJ tank is deeper than the JK tank so the fuel pump needs to be extended. This was accomplished with the GenRight JK Factory Fuel Pump Extension Kit $59 (https://genright.com/products/jk-factory-fuel-pump-extension-kit.html).
The rest of the lines are easy to adapt and hook up. Autozone has everything you need to hook it all up.
We will see what kind of damage it gets once it gets off-road and start crawling. Everything works. No leaks, no codes.