I run 3 1/2" collector neck to 3" then use Hooker Aerochambers in front of diff.
505 , tf270 heads , Dougs headers
Works for me not excessively loud at lower street rpm, ok wide open .

Tex

New best ET 10.259@129.65 .
New best MPH 130.32
Finally fitted a solid cam,
stepped it up a bit more
3690lbs through the mufflers
New World block 3780lbs 10.278@130.80 . Wowser 10.253@130.24 footbraking from 1500rpm
Power by Tex's Automotive