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The combination of a stock length, 6.760-inch Eagle rod; 600-gram Lunati custom relief piston; and 160-gram full-floating .990-inch diameter wrist pin makes up the remainder of the rotating assembly. The rods are retained by ARP bolts. For a street engine, this is much lighter than usual and probably assisted Indy in breaking the 500hp barrier and offered increased rev-ability.
1969 Road Runner Project, Part IV

 The combination of a stock length, 6.760-inch Eagle rod; 600-gram Lunati custom relief piston; and 160-gram full-floating .990-inch diameter wrist pin makes up the remainder of the rotating assembly. The rods are retained by ARP bolts. For a street engine, this is much lighter than usual and probably assisted Indy in breaking the 500hp barrier and offered increased rev-ability.  View Related Article

 

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