Hi Guys. I am reviving my IDI. The rear tank sending unit broke off and the front tank won't take fuel so it has been parked for a while. I dropped the rear tank and installed a new 40 gallon and modified the old sending unit to work with it. Now I am on to the front tank. It will not take fuel. My truck has a utility bed and I always thought it was an issue with the angle but today I loosened the hose from the filler and tried to put diesel into the tube at a better angle and the tank still won't take on fuel. Is this just a venting issue? Or is there something else I should be looking at?