Small Blocks and Parts

Rick Lawler said
These head are not machine for the offset push rod holes however this casting was used for early 6 pak motors, both heads dated 12/69, The Factory just pulled off the shelf heads and had them machined for the offset rocker.

Then they are not “6 Pack heads.” Even though the factory (may have) used “O” heads doesn’t make these 6 Pack heads. Mistakenly advertised.