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I recenty got a 460 that had a Holly double pumper on it.It has a "Proform" center in it,no choke.How can I tell what CFM it is supposed to be? There is a 173 stamped on the throttle plates (all 4 same size).Don't see any other markings.
 

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99.9 percent of the proform main bodys are 750 cfm. The 173 is the 1 & 11/16 dia throttle plates. JOE SHERMAN RACING
 
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