[GMH454]

I don't think the factory ever intended to bore them out as far as this guy has. In the photos there is not much alloy between the liners. As its out so far not sure how good a performance engine it will be, although the extra cubes would help, it could be make very expensive sounds. Probably be a blast in a street rod.

Without the correct casting marks can't see it pulling big collector dollars, I'm guessing it will rate below a Yenko Block. Also think the 1968 date could be wishful thinking, as its not winters it might be 1978.

I will try to dig out info on the "L C ", though it does not sound familar.