Used exhaust install question?

Just finished my exhaust a couple months back. If the piping is in pieces then you can fit it with everything in its place. The 2.5" kit that I bought from Jeg's has the break in the piping at the top of the hoop over the axle. So I could simply piece it together, then weld. Its tricky going over the axle around the shock then along the leaf springs while routing along the gas tank, with 1 big piece. If its 1 piece from the header back then you'll probably have to drop the axle down.