69-70 427/454 Big Block Chevy Engine Block 4 Bolt Main 3963512 Real Deal K 12 9

Description

This is a very nice 3963512 4 bolt main engine block. It has a fresh .030 over bore(4.280) that has never been ran. The casting date is K 12 9 which decodes as November 12th, 1969. This is a factory 4 bolt main block, not a converted 2 bolt main. This is a very hard to find 1970 454 4 bolt block.
This block came to me out of an estate as a fresh built 427 shortblock. The engine had been a complete engine and after the man passed away, thieves broke in and stole a couple cars, and many parts, including the heads and induction off this engine. I don't know what the top end was but it must have been pretty stout based on how the shortblock was built. It had aluminum rods, head and main, studs, Summers Bros gear drive, and a Crane solid roller cam. Since the block is dated during 454 production and the internals were dusty, I decided to tear the short block down and sell the block by itself. The block was decked when it was built but I could see the factory CRV code indicating LS6 written on the back of the block before I painted it(I have a picture of it). This listing is for the block and main caps only. If you want any of the other parts from the shortblock, I would be happy to sell them to you.
This block is in very good condition as shown. I see no breaks or repairs. The cylinders are bored 0.030 over and are awesome with no damage save for some light staining from the rings staying in the same positions for a long time. All threads are in good condition with no helicoils or thread inserts. This block is ready to be honed for your pistons if necessary, cleaned,and assembled. The 1970 4 bolt main 512 blocks are very hard to find since the only production application that called for a 4 bolt main 4.25 bore block in 1970 was the LS6. Most have been run hard and put away wet. Finding an original 1970 454 4 bolt block that has not been sleeved, cracked, bored to the max, repaired, modified, or otherwise butchered is a very difficult task today. Don't miss this awesome factory high performance block.
This is your chance to own the real deal 1970 454 4 bolt main engine block you have been dreaming about at a GREAT PRICE. Don't Miss Out!
Check out my other listings for more rare and hard to find parts.
Shipping:
I will be happy to palletize this engine at a cost of which is what it will cost for the straps and pallet. I will also drop this engine off at any shipping terminal within 45 miles of Santa Cruz, CA free of charge. Shipping arrangements and payment are the responsibility of the buyer. Most of my customers end up using YRC freight which used to be Roadway Express and Yellow Freight. Other customers have had luck with freightquote.com. Another option is Fastenal who also does shipping. The Fastenal closest to me that does shipping is in Watsonville, CA. The weight of these parts when palletized will be about 250 pounds.