I'm just about done gathering parts for the swap on my 4/6 dropped 93 C1500 extended cab. The drivetrain will be 5.3/NV3500/3.42/28" tire. The 5.3 will be stock other than 212/218 cam,tune, cold air intake and Schoenfeld swap headers. The goal is 20+ mpg freeway and to be able to drive it anywhere for long periods of time.
It is time to plan the rest of the exhaust system. I do plan on having bolt on collectors welded to the headers and I do like magnaflow mufflers. I don't want the exhaust tip to be visible so the tip will be tucked up under the corner of the bed and pointed at a 45 and cut flush withe the bottom of the bed. I don't require cats. What I don't know is what works best on an LS, Y pipe to a single 3", duals-2.5" or 3", or something else. I want to have as much low end torque as possible.