Took my 68SS down to my local exhaust guy and asked him about what he thought would be the best setup for my mildly modified 396. He said that 3" pipe was overkill unless I was running some 500+ cu. in. monster. He recommended 2 1/4", maybe 2 1/2" pipe with flowmasters instead. This shop has done setups for my old 460 truck and my dad's 98 SS with great results, any reason to think he is off the mark with this recommendation?