I'm curious about how to track certain types of songs. The example I want to use is "Classic 50-1" which can be found in my signature. There are 2 guitar parts. 1 clean and 1 dirty. Should each only be tracked once, or double tracked (recorded twice, not copied)? Should one be panned left and one right? When I add a solo, where should it sit in the mix? left, right, center, or copied and placed left and right?

I'm going to be redoing this song and a few others that I've already done is why I ask.