I bought a 440 source WPH back in 2008ish... never could get my car to cool down... put a spring in my bottom hose, several fan blades and clutches, different WPs.. after 2 years I came across a post saying that the 440 Source HP aluminum WP Housing choked down to the size of your index finger inside the housing. Openings looked OEM and correct but it narrows down inside the housing... Bought a OEM iron WPH on ebay that came off a 68 hemi ... and my engine runs as cool as a cucumber ever since..... Beware of the 440 Source Aluminum WPH