Here’s the stamp from the L78 on BAT.

----That's the nicest trim tag I have ever seen!....Bill S

Richard trim tag 4L and a color change and 06C ?

Not typical engine stamp. The rear is coded QL which decodes to 331 non posi and trans stamp should start with P = Muncie 7 = year or P7 which it doesn't, and no claims of originality of drivetrain.

Isn’t that a z28 code? 4L

Ooops wrong TT, not the 4K car. My bad.

LOL 😆, I,m messing with you guys showing the 4L TT. Was wondering who’d be the first to notice it. Check out the color of the 4L TT. Very cool 😎.

Any thoughts on the trim tag ? Should a 07B car have a 406 or a 323 block ?

It's ironic you ask that question because in 1996, I had to prove my 323 block came in late production 67 L78 Camaros. The conventional wisdom at the time was skeptical about the usage. This is a 1994 version of By The Numbers in later versions this was updated to confirm the usage. Back to your question you need data points to prove your question. I know of 3 7B built cars with 323 blocks.
In addition heads 840 were used in late production such as my car and the temp sender boss was not drilled or tapped since the sender was not mounted in the head until 1968.

The bid is at $51,500 with 4 days to go.