This is a picture of Dynatech headers (part #115-909400) on my LS-3, and the orange bungee represents where the steering shaft would have to go from the steering column to the steering rack input shaft. The bungee is stretched over the #3 primary tube, i.e. the #3 tube is in the way. This is a new Chris Alston subframe, but I had the same problem with my Martz frame. I COULD fabricate something and run an intermediate u-joint as I did then, but I would prefer to avoid that if there are headers that will fit without modification. Anyone have any suggestions for headers?