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Crank GM Forged Steel 4.000 stroke one piece rear main seal.
Rods GM I beam forged steel 6.135 Freshly resized, 7/16 bolts.
Pistons Probe #14469-033 Dome top +15.7cc with rings, 4.500 bore to make a 509 Cubic Inch Motor.
Flex Plate.
Harmonic Balancer.
Complete rotating assemble balanced from Barry (Obnoxious)
And fully ready to be installed, all bearings are STD. $1500.00 O.B.O.
 

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You didn't mention that the rods are freshly resized, 7/16" bolts.

The factory GM crank is actually 4.00" stroke. Pistons are 4.500" bore to make 509 cubic inch.
 
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