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.