Thanks True.
I tried to use only a couple of 90* fittings to try and cut down on restriction but there are quite a few bends in the system because of the way I followed the frame. I think that the lines are far enough away from the exhaust. They run on the inside of the frame just up to the subframe connectors and then they run outside all the way to the front. The closest that they might get to the exhaust is by the front of the header. This is the best picture that I could find.
It's hard to tell how close it is. I'll measure it tomorrow and let you know.