the iron 8L V10 is a specialty truck engine for towing

even though it has a reputation as a gasoline hog, back in 1994 Dodge was quite proud of that this 488 ci engine had a better BSFC than the GM 454 V8

there is a SAE paper on the development of the iron V10 that emphasizes its below 3500 rpm towing capabilities

http://papers.sae.org/933033/

Allpar has a pretty good write up on the tech

http://www.allpar.com/mopar/V10.html

sample quote

A Helmholtz resonator intake manifold was tuned to boost torque at 1700 and 3300 rpm. Long primary runners curved over the right cylinder bank to clear the hood. Resonance in the 25-inch primary runners enhanced low speed torque, with peak torque as low as 1200 rpm. Two plenum chambers supplied air to five runners each. Plenum chamber volume was tuned to resonate at 3300 rpm, broadening the torque curve. Passages across the longitudinal center of the manifold fed air from the throttle body to the plenum chambers.

longtime Chrysler engineer Willem Weertman has a section on the V10 in his book "Chrysler Engines"

http://books.sae.org/book-r-365/