I am leaning towards the 3" single because I,
1)Like to be different

2)Truck is already single exhaust and will appear "stock"

3)I already have a 3" mandrel bent tailpipe and stainless long case 3" in/out muffler from a departed project.

Though the twin Magnaflow mufflers and resonators I have lying here are creaming what about me?!Maybe they will find their way to the 75 Newport.