And the other side. Note the JL at the end of the engine production code. That's a 375hp 396, (aka L78) iron heads with a TH400. Us kids weren't told of aluminum heads. Took me six months to buy a set.
Also note on the other side of the plate that the TH400 I have is spec'ed for a 427ci/425hp or 430hp OR A ZL1!!!!