Thread: Pulley Issue?
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Old 03-12-2026, 12:28 PM
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73ta 73ta is offline
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Originally Posted by Mr. G View Post
Factory A/C pulleys diameter to outer edge are 6 1/2 inches for double groove water pump pulley. 8 inches for double groove crank pulley and approx 7 1/2 inches for single groove pulley behind crank pulley. I measured these on my '73 Formula with 455 and factory A/C. Just in case you wanted something to compare what is on your car with.

Thanks, my diameters match, pulley groove is bigger for the PS belt on my pulleys. Fixed it with a wider belt.

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