Not to be rude, but did you bolt them up tight? I'm only saying because I have these headers in a 71 440 Challenger and your problems are opposite of mine. The passenger side fits perfect. The drivers side hit everywhere. I had to ding them for the stock power steering unit, the steering coupler and the torsion bar. I did buy them at least 5 yers ago so maybe they tweaked the design.

Good Luck