340 4 barrel and 340 6 barrel: were they really UNDERrated?

Bewy said

273,
The purpose of the test was to see if the engines produced the advertised hp. The 340, as you can see, was the only one that did...& exceeded it.

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Why the line through the text ?

Fair enough, pretty much the point of this thread if the 340 exceeded it's rating and bet most agree it did, then question is by how much, where generally the arguments start.

You said you couldn't see 320 hp but you own proof shows 295 hp with a basically net rated, so the engine measure in gross probably be pretty close to 320 hp.

What would be gross nowdays generally be

best tune

no accessories

electric water pump

headers but to find stock gross #'s running manifolds would be better

I don't see it being hard to pick up the extra 25 hp with those conditions but even if not it's still seems to be at least a 300 hp engine.