Flowtech Headers

Well.... I bought some and put them on a '69 Valiant 2 door post 318 p.s. standard brakes, I converted the car to bbp brakes with no power assist, anyway, I had to shim the motor mounts up 1/4" to raise the engine up and it still hit the p.s. box slightly, I had to ding the pipes slightly there not a big deal, the worst was I had to do was ding the #5 pipe 1/2" to clear the coupler on the steering shaft. The passenger side was good except it hit the torsion bar and had to ding it slightly too.
A friend of mine had a '75 Dart sport with the same set up, other than a spool k-member and the only thing he had to do was clearance the pipe at #5 a little other than that, they fit very well.
I looked on the website and they stated that they were not intended for power steering, so there you go.
I hope this helps you.
Tom.