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I’m in need of a standard rotation water pump for my SBF. On a project I'm working on, I’m going to be using serpentine belt drive, with just an alternator off to the passenger side. No other accessories.

Running the Mustang water pump numbers... 79-85 = standard rotation. 86-93 = reverse rotation.

Here's my dilemma. I have both, an ‘85 GT (carbureted) and a ’86 GT (fuel injected) and both are serpentine drive, with reverse rotation water pumps. (belt raps around battom of crank pully and under bottom of water pump pully) According to the 79-85 and 86-93 water pump dates, this has me confused on the standard/reverse pumps.

What gives?
 
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