Someone had installed a manual two tank selector swith which had one side blocked off to allow for single tank on and off. The valves hose male connector was 5/8" in diameter. Someone force a 5/16 fuel hose over this 5/8" connector. As you can imagine the hose was completely cracked and ready to blow loose. If this would have occured the raw fuel would have been spewing into the engine compartment about 15 inches from the exhaust minfold ect ect. That would not have been a good thing. I simply hooked it up the way it was from the factory. I can post pictures if you want.
Make sure you have the electric solenoid valve in line and it is working or you may spew gas all over when cranking the engine or break something internally in the engine. It turns on and off with the ignition switch and is usually below the fuel pump.