Melling has come out with yet another oil pump, this time for various Ford truck, Mercury, and Mazda V-6 engine applications. The Melling part number for this high volume oil pump is M328.

Advanced oiling system: the oiling system incorporates a new variable-displacement oil pump that enables ... six quarts for the 4.3L V6 and eight quarts for the V8 engines. All engines use GM ...