4 speed headers?
I am running a set of Performance Automotive Wholesale headers, they were $99.00 specials ten years ago. They cleared the powersteering no problem. There was some dimpling required to clear the pass.side torsion bar and the steering linkage rubbed two of the exhaust tubes next to the oil pan on the driver side if memory serves. I think you also have to drop the center link to install most of them. They have been drug a couple of times but for the most part they have good clearance. I don't think these would interfere with clutch or shift linkage on a manual shift car. As always, anything listed for a mopar should say "can be made to fit":)
You should install new motor mounts, especially if spool type to make sure the headers stay off the steering linkage.