need advice: 440 in a Duster

Having lived with 2 big block Darts, 68 GTS 383, 69 GTS 440, I would not be inclined to have another. The loud pedal giggle factor didn't outweigh the daily headaches (no stopping or turning to speak of), besides, you can get 440 power out of a /6. Why go through all that? Just my $.02.