Need help with 1975 Duster /6 to 440 conversion

The headers is a problem, especially with power steering and if it an auto on the column, and then the center link, trying to get a BB between the fender wells and clear all that on the drivers side is almost impossible, some brand headers just won't make it, maybe someone will chime in and tell you what headers is best, myself i finally gave up and went stock manifolds.