I have been assured that the drivers side exhaust is passable, I am getting ready to put that to the test soon myself. Are you using your factory frame motor mounts? When I did my swap I cut mine off and placed my motor where I wanted it, low and toward the drivers side to help in clearing the diff. My exhaust manifolds are not in the way of the frame, and we both have the same frames. My crossover pipe gets pretty close to the frame on the drivers side, but there is no contact between the 2.