Block is GM 3999289 4 bolt mains 512 C.I.
Date is L19 73 (December -19-73)
Pistons are JE 735 ( 4.375)
P/N 258260 (.675 dome)
Rings are Sealed Power R9799-005
Rods are Eagle (6.405") with ARP 8740 bolts
Crank is a Lunati BP421
(Magnafluxed and reground ready to install)
This shortblock has a handful of passes since freshened up but it spun the #7 rod bearing . I have magnafluxed and reground the crank so it is ready to go. I purchased 1 new connecting rod so the rotating assembly will need to be re-balanced. This engine was making 650 HP at the Flywheel with pro one heads and an 1150 Dominator. The cam was a Comp Cams 11-703-9 mechanical roller. My 3300 lb. car was running 10.00 at 132 mph with this assembly.
717-870-three seven one nine.