It might be moot, but I think Chrysler SAID they made 245 with <8.4.
They also SAID they made 275 with 10.5.
They Said a lot of things.
Like 425 out of a hemified 426,
They also said their 3800lb low 15 second trucks had 225hp. If the results aren't worse from the '70s than in the '90s from themselves and other makes...
Raising the compression alone will not just make more power all around on the same gas in the same powerband- it's not gonna happen with everything else staying the same. Whole lot better having 30 less HP than not being able to run pump gas. Those E58 and E55 cars and Lil Red Expresses had larger cams with the same low (actually calls out less) compression as the other 360s and those were not slower. Not to 60, not to the end of a quarter, nor in top speed.