I'm not sure your research could ever amount to what MoPar has put into this engine. Why reinvent the wheel? 700hp that is good for 70,000 miles without batting an eye.
I wonder how many garage built motors could reach 700hp let alone 7,000 (10% of) miles.
Folks are spending $10k on a 500hp 408 stoker with questionable longevity. I'd say the HellCat crate at $12k is a smokin deal, at $17k it is just an option.
I wouldn't spend that on it but some of you guys have that much in your paint job and your car is still in paint jail.