[1969L78Nova]

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I spent about 7 years researching this already... with that said, I'd say the heads were installed somewhere along the way, the piston/head combo ain't friendly with stock GM head gaskets... I can't explain the P-Plate though Lucy..

[/ QUOTE ]Instead of looking at the heads which could have been changed early on perhaps in error under warranty the POP and the block stamp should be examined carefully.

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From the Hemmings write-up:"On the mechanical side, Brian Henderson of Super Car Workshop, who had recommended Legendary when his own slate was full, examined the block's decks to see if the factory broach marks were intact; this was a means of determining if the code and VIN stampings were legit or recreations. Reportedly, despite initial skepticism, Henderson came away convinced that the engine was unmolested; because the CKT code is unique to an L89 Nova, this looks to be the only one known to exist.

After Henderson looked at the engine, Legendary had Active Engines in Mississauga, Ontario, go through the block again."

Looks like both "Active" and "Henderson" need to take a SECOND look !