4 Bolt Main 454 Shortblock 3963512 Dec. 8th 1969 Fresh Build
 

This is a freshly machined 4 bolt main 454 shortblock. The casting number on the block is 3963512. The casting date is L 8 9 which decodes as Dec, 8th 1969. There are no stampings on the pad and the assembly date is on the starter mounting pad. Te assembly date on the starter pad shows this was originally a CE block used as a service replacement or crate engine.

This block is freshly built and has never been started since being machine and assembled. This was a ready to run long block but the heads and intake were not correct so I removed them. The bore is a fresh 4.350 with flat top single valve relief pistons. The rotating assembly is balanced with factory dimple rods with 7/16 bolts. The crankshaft is a factory 3963521 "3521" forged unit which is the most heavy duty factory 454 crank produced. The cam and lifters are new but the specs are unknown. The timing set is the double roller type. The balancer is a new 8 inch unit. This block has no sleeves or other repairs. This is a super nice 4 bolt main 3963512 shortblock. In 1970, the only factory 4 bolt main 454 was the LS6. This is a very hard to find shortblock that is fully machined, assembled, and ready to install.


SOLD PENDING PAYMENT


Thanks,

Jason

More pictures:

I have more than that in my machine shop bill. That is a steal!

4.350 fresh bore?? .100 over?

Yep, .100 over.


Jason

476 cubes! No replacement for displacement, when in doubt, bore it out.

Yes, the extra cubic inches are a cool bonus. I'm sure the machine shop bill on this engine was not cheap. The engine had a fresh set of 1970 3964290 heads if anyone is looking for a set.


Thanks,

Jason

Jason. How much for the heads and do you have the dates?

I will start a new ad for the heads so this ad does not get confusing.

Thanks,

Jason

SOLD pending payment.


Thanks,

Jason