The future of these truck Magnum engines are junk yard or possible hot rod truck. The hot rod truck will have to wait until there in excess of 25 years old in New York to be exempt form tail pipe testing and free to hot rod as seen fit.
Or.....you could get the Magnum out of a truck and drop it into the 25 year old or older a-body of your choice! Might be a cheap way to get a roller cam engine? What do you think Rumble?