The right side fits perfect but the left is hitting the starter. The car version swings away from the block further so I have a pair of those on the way to see if that will work. I'm trying to avoid the cost of special headers. I'm having to use a 4L60E trans so there's an adapter in it and it makes the starter stick out slightly further than it did on the 518.
I couldn't get the 518 to fit in the tunnel with the Hemi like it did with the Magnum I had in it.
I picked up a 3' length of 2.5" pipe yesterday and with some drive shaft tunnel "massaging" it will fit, abet very tight. A tight X pipe should fit right behind the X member.