I wonder how the fuel efficiency of a 440 V8 with EFI would compare to a modern effort like Ford’s 7.3 V8

That Dyno test comparison would probably never get funded today.

I do see a surprising number of shipping containers on open trailers being hauled on the interstates by 3500 size pickups.

I guess this is because of a shortage of “fixtures” that 18 wheelers almost exclusively used to deliver shipping containers “the last miles” to customers.

With today’s abnormally high diesel prices I have wondered if gasoline 3500 pickups could deliver shipping containers at a lower cost per mile than a modern diesel that also requires buying DEF..

Swap in a big cubic inch 440 stroker with EFI running a 20 to 1 AFR into a 1994 Ram Dually and see?

What transmission (or camshaft) would be another challenge....