Mufflers choice ?

70 Dart, 370 hp 360 magnum, with a 150 shot of gas
Dougs D453 headers
Looking under the car for clearance for the mufflers, it Looks like offset inlets/outlets
Might provide best clearance versus straight thru.?????
3 inch collectors, 3 inch pipe all the way out the back is the plan
Im listening to ultraflow welded, and super turbo sound clips