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Old 05-11-2008, 12:09 AM   #1
John A. Marker
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Default ZZ4 push rods

Discovered that the ZZ4 when using roller cam, and roller lifters uses a SHORTER pushrod . This combo uses 7.2" rods. Figure this into your future build if going to the ZZ4 or a roller block.

Oh yea, also used a different flexplate.
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Old 05-15-2008, 09:34 AM   #2
rodj
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Default

All the SBC roller cam engines (late L98 , LT1/4 , ZZ4 , Vortec ) have 7.2" pushrods v 7.8" for flat tappet cams.

All the above with one piece cranks have a flywheel / flexplate with 3.00" PCD crank pattern v 3.58' on the two piece seal cranks.
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Old 05-15-2008, 09:34 AM
 
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