385 hp is not going to cut it unless they continue two v8's and make the 385 very noticably better with fuel efficiency.
The 2025 Ram HO is putting out 540 hp with 520 lb-ft of torque, so a 6.2 replacement will need to play in that area. Ford will be doing an update soon as well, you know they will not concede the 0-60 time to Ram for long. So again, a 6.2 needs to up the game considerably.
I would like to see a 6.2 replacement with 500+ hp, pushrod, dual injection, no dfm, 10 speed.
For the smaller v8, focus on fuel efficiency. Keep it 350-ish hp, tuned for mpg, with architecture similar to 6.2. Maybe a tow mode that drops efficiency in favour of more power low down but this could be wishful thinking and not possible.