i hear these drives make a different noise. are they too noisy, or do they make the he-man noise we all love to hear? getting a chance to install one, after i mounted a crappy oil pan under the 283. yeah i was too much in a hurry to hear it run again.will do it during the pan change.speaking of he-man noises. my muffler guy insisted i go to a two into one 3 inch exhaust with a flow master. i was understanding that duals were better. he claims theres better back pressure with the single exhaust. it does sound good. i want to do the 41ford truck that has a flat head, are duals better? thanks john.