Hi and thanks for using 2CarPros.
I see it's apart right before the catalytic converter. Federal law requires a converter to be installed. With that in mind, I don't know the state you are from, so be careful with where the exhaust exits. Make sure what the state requires.
Next, as far as fabrication, when it is done, shops have a pipe bender to customize things to what they need. Also, there really isn't enough room to take the exhaust over the frame. It will hit and create a ton of heat under the bed, so I don't recommend that.
Now, as far as welding, the best thing to do is get some scrap metal and give it a try. The exhaust will need welded in a manner that requires there are no pin holes in the weld. For the muffler options, I really recommend you ask the local parts store. There are so many aftermarket ones available. Plus, you want it quiet in the vehicle and you didn't mention other than that. If you want to hear it when driving (other than an idle) that is going to require a specific type of muffler.
I hope this helps. Let me know if you have other questions.
Saturday, December 22nd, 2018 AT 6:37 PM