The one that sounds best to your ears.
I can sell you a set of turbo mufflers that came from my Summit kit. They are 2-1/2 off set in/center out.
They’ll sound something like the first set of mufflers in the first clip. It’s a 10.5-1, 340 with a 241/247@050 cam w/.548 lift on a 108.
The second video is on a low compression ‘79-318 with a very mild Crane cam on a 112 C line. It was run stone cold for the video in November in NY.