I'm running the aeromotive phantom in my 74. Just recently had my first issue with fuel level being too low, but it probably only had about 1-2 gallons left in the tank. I bought a new 73 tank and put the fuel pump in it. The 73 tank doesn't have the hump for the evaporator. Plugged up the unused vent lines. I did have to mangle the fuel level arm, so my gas gauge is more of a "yes or no" indicator at this point. But I haven't had any fuel delivery problems otherwise