Captain Obvious stuff on 440 vs 426 Hemi curves; been that way for 50 years. It's the heads; remember the air pump analogy...
They didn't do the Hemi any favors with 9.0:1 static CR; they like CR.
Heck, that's why the Hemi chamber was developed in the 1st place - power & reduced detonation on crap gas.
My 438" Hemi street motor, old-school Crower SFT with similar specs, was 10.8:1 and happy on pump 92.
490 ft/lbs, 540HP by 7000 and climbing, and not a radical thing to operate. Did need 4.10s but it was happy cruising at 3500.
Like the world's largest SBC, it was plenty adequate under 3500, but after that, impressive and tore through the tach.

MT isn't free with Hagerty any more, it's $3/month.
Engine Masters, the Roadkill & HRG stuff, and old episodes of TopGear (UK) are all I'm interested in, so still deciding...