To be honest.....
That menu looks better than the 365horse 327 chevy by quite a bit. The chevy was probably good for an honest 300-325 at the crank, so I can easily see that teener somewhere between 375-400.
And that's probably high 11s/low 12s in a light a-body, depending on prep/gear/converter.
(Wallace says 11.80s with 380hp at 3200lbs.)
I went 11.50’s-60’s with that detuned( ran good bit smaller cam) on that enginemasters 477 horse 30 over 318 at 3400 pounds with a Chinese dual plane. Cam was 231-237 vice the 247/247 cam it was run in the competition with. It was 10.44 to 1.
So it wouldn’t surprise me if this piece could run 11.80’s at 3200.
Sounds like a very nice motor!