SBC Block and crank - GM #3959512
 

$700.00 for the block. The block was last used in the 70's. It is a pristine racing prepared block. Very thick walls, sonic tested average wall on the thrusts is .300. The block was rough bored block out of GM engineering in the 60's. It was bored and plate honed to 4". It was a two bolt main block converted to 4 bolt billet aluminum main caps. Lick the cylinders to seat the new rings and wash. Don't hassel with filling a weak block when you can have one of the thickest oem blocks out there. I also have a 3" stroke forged steel trans am crank with chrome journals. ( $500 for the crank)