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Gary, the water pump pulley is the same diameter with 2 groves. The crank pulley is actually 2 pulleys, one sets inside the other and both are same diameter. inner pulley is single grove and outer is 2 groove.
Bill
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atheystruck@comcast.net
67 1/2 ton 4wd custom cab
72 1/2 ton 4wd super cheyenne
71 1/2 BB super cheyenne shortbed
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