I still have a 4" built with 3" mains and 2.25 rods "P Dude" got made before all the forged cranks came out.And some 6.8 Crower Sportsmans with a Pontiac journal I got from Paul Spotts years ago.
I bet any difference in a 6.625 rod vs 6.8 is going to be theoretical. It was used to have an available rod before we had Pontiac forged rods out there other than Carillo and Crower billets.
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Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune [email protected]
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
1964 Corvette Coupe 327 4 speed
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