I will go with most here, however you want to make certain that whichever Melling Pump you decide to buy is from their "Select" Series-Melling has "cheapened" their low end offerings (the rumor is that the Big 3 wanted them to make them lighter in thier quest for fuel mileage, but I cannot confirm this)-
Anyway, there have been many reports of Pump failures due to high rpm and the resulting vibration breaking the casting at the "neck"-and you know what the end result is-