Am I recalling correctly that selfsame powetrain could be installed in the short lived "Feather Duster?"
Not a Mopar historian by any means, but I recall that Car Craft had a series on hopping one up - maybe HRM or PHR had a series on prepping an E58 for NHRA?
I'm sure the Chevy beanies went to work on the double to try to factor it into oblivion or kill it outright.