My Old man had a Landcruiser that had a 327 / 3 speed, 410 gears all around and that jeep you could hear coming from 3-miles away sometimes farther on quiet days. We drove that thing all over the place had to crank the radio up loud to hear it!! I imagine mine with 440 / 4-speed ,391's will be close to that, but the sound deadner and resonators will calm that down a bit.