In my mind, these older pushrod V-8s are just better suited to lower-RPM torque due to their valvetrain. It's not like smaller OHC sports car engines where they can physically rev to the moon and generally make hardly any torque below 3000 rpm. You can build an SBM to rev to 7k but you'll need to spend money on making the valvetrain comfortable at that speed. The stroke doesn't have as much to do with its ability to support high revs like smaller engines. The top end also doesn't flow air (relative to displacement) anywhere near OHC sports car engines so money needs to be spent there as well to make power that high up. A 400whp 360 with the right cam and intake will pull just as hard at 2500 rpm as it does at 6000. The torque curve is extremely flat compared to a small OHC engine so you don't need to downshift like you're used to with typical sports cars.
G3 Hemis have the air flow and valvetrain that makes them generally have a powerband higher up than older wedge engines but they still make tons of torque in the midrange. That's why they come in pickup trucks, SUVs and heavy cars. I have a 5.7 I'd like to put in an A-body someday but it'll get a pretty big cam and single-plane intake because a lighter car like that simply doesn't need the low-end torque it offers in stock form. Think of the V10 in the Viper (extreme case), the brutal torque in that light of a car takes a lot of practice to master and make use of without just blowing the tires off. I watched a video by Dead Dodge Garage on YouTube where he was test-driving a classic Challenger with a stock 6.4 and Tremec 6-speed and he couldn't give it much more than 1/3 throttle without losing traction unless he was in 5th or 6th gear. Fun but also a handful and not very useful on a track, would work better with a big cam that softened the low-end torque and moved it higher up in the revs.
Not sure if any of that is useful just thinking out loud lol
