512 block copo camaro 4 bolt 060 overbore

[Stefano]

COPO,
Just my opinion, but I would not call any 512 Block common. While some are quite rare.
The HI-PO 4 bolt main varriety dated early and mid 1969 are much more desireable than the ones produced in late 1969 through 197O.
Just look at how many LS-6 Chevelles were produced in relation to all other combinations in 1969.
GM performance recommends sonic testing for core shifting on any bore of a Mark IV block beyond .060.
Also check for a VIN on the cast pad next to the oil filter. A known and saught VIN could also affect the value of this block.
Apples to apples, a fully sleeved block will not have the structural integrity of a non sleeved block. Plus, sleeving is not inexpensive.

[sixtiesmuscle]

Just curious, what application for this dated block would have the vin on the pad by the oil filter?

[tom406]

Any application where the line was running too fast or the guys were too lazy to remove the now-included-with-the-assembled-engine alternator, stamp the VIN, and replace said alternator. We've had at least one '70 LS6 Chevelle and I think a '70 396/350HP A/C car where this was the case, where the VIN was stamped on the rough cast surface near the oil filter. I'm afraid I didn't record the assembly plants or dates for posterity.

[Stefano]

1970 through 1975 engines are identified by an eight character alpha-numeric code.

The application varied depending on the assembly plant.

For example: F0630CRV could have been stamped in one of two places on the front engine pad forward of the passenger head or behind the oil filter on an unmachined pad which is the transmition flange.

F = Flint assmembly plant
06 = June
30 = 30TH day
C = Chevrolet Motor Division
R
V = 454/ 450 HP manual trans

I know all Corvettes were stamped on the front pad. Does any one know the specific plant information as to who and when it was stamped by the oil filter?

[Keith Tedford]

When the engines came to the Oshawa assembly plant from the engine manufacturers, they were pretty bare. The alternator, starter, carburetor, etc were installed as the engine went down the engine line. The engines would come with a flex plate for the automatics or clutch assembly for the standard transmission applications. Some processes varied from plant to plant.

[Stefano]

Chevy454.
There was an LS5 Corvette in 1970. In 1971 GM even mfged. some (188 if I remember correctly)LS6 Corvettes . These BTW had aluminum heads so that the compression ratio didn't get knocked into the ground.

[Stefano]

Chevy454,
Yes,there was an LS5 Monte Carlo Super Sport. You could even get a 4 speed with it.