426 Hemi or 5.7 Hemi for Duster

I think some people missed the original question:
"Which would be easier and more affordable?"
Obviously the 5.7ltr is not even in the same price range as a Gen II. Major difference there. Even with an HDK setup it would likely be easier to install the 5.7ltr as well solely based on dimension. Header fitment and selection should be easy as well as all other external accessories.
Now as for cool factor that's a different question. I think they both have coolness in thier own way. But there is no replacing the absolute overwhelming monster size of the "Elephant" set between the inner fenders of an A-body. I had the pleasure of seeing Denny's Duster at Moparfest. Outstanding.
Obviously for more money you get more "cool".

JMHO
:D