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IIRC, the whole pulley change thing came about because of the change to the 6-vane A/C pump on the Hemi....this pump needs to turn faster so a smaller diameter WP pulley is used.




Pretty sure A/C wasn't available on a Hemi.



He didn't say it was , he left out the word WATER before PUMP though ...



Whoops.....I mistook "6-vane A/C pump" as some type of A/C pump. I realize now that he was referring to the 6-blade A/C style water pump.