The angle of the inlet and outlet ports changed in mid year 1955 to clear the center position motor mounts. Early pumps had the ports front and rear- - - -newer designs had them at 45 degree angles.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!