Yes they do lift fuel better than the other pumps. I myself have called Walbro and talked to the Engineer that built that specific pump "GSL392". YES they have a special division just for that pump. I also emailed him pictures of my 3 pump GSL392 set up as I asked him the questions over the phone about the DEAD HEAD and Lifting Fuel. He says it has been tested to lift fuel up to 5 Feet. This is why it is used by the Diesel Truck guys quite often. It is also designed as a DEAD HEAD pump so if you have multiples like me you do not need to worry about fuel going right back to the tank through a pump that is not turned on.
