I have a set on my 65 Barracuda, it is not power steering though. They are close to everything. You do have to take the steering linkage apart, drop out the starter, and it has been my experience that the big factory starter offers more clearance than does a mini starter, not much but some. Droping the "K" member does no good, the drivers side collector straddles (2 tubes on eather side) the torsion bar. Taking the "T" bar out does no good cuz the hex will not pass thru where the bar has to go.
I ran into clearance issues (minor) at the steering box coupling (dimple a tube), steering linkage (tie rod ); drivers side; rubbing on a tube as it passed under.
Lastly, and this is very important: At a minimum, take the slip tubes out once a year, every other year, buff the oxidation off and coat them with never-sieze, even if you assembled them with never-sieze. Over time they will oxidize and bond themselves together and then you can't get them off/appart!!!
Other than that, they're great headers.