Just installed the 60# injectors. The Walbro 405 also known as the walbro 400 for those who are interested in what I did to install it into my tank.. I had to cut the hangar on both sides at the bottom because there is no way the 50 mm end and the thickness of the hangars on both sides would fit.. The opening on the top of the gas tank is only about 52mm(guess) the bottom of the fuel pump is 50mm so the hangar thickness on both sides is probably equal to 4 mm 2mm each.. (all guesses.. the pump lower is 50mm so thats what I judged the measurements from.). So thats roughly 54 mm you have to put in a 52 mm hole. Basically I cut the lower portion of the hangar off at the bottom, connected the 5/16 hose and electrical connection and used the rubber grommet off the old pump I removed, put around the skinny part of the new pump / hangar and used 2 stainless steel zip tie type connectors and firmly clamped the hangar to the new pump. Installed the small sock and installed the assembly into my 90 mustang fuel tank. While I had reservations about installing the pump in this fashion I did feel that it is firmly secured to the hangar and not falling out of the hangar. The sock is pretty close to the tank bottom so it really has no where to go anyway but.. There is a baffle in the tank so I couldn't see the exact clearance between the sock and the bottom of the tank, I would guesstimate a 1/4 inch.