Big block A-body headers

If you look at the application list toward the bottom, there's not the first A body listed. Just the big cars. Also it says in each application that they will not fit power steering....and that's in the B bodies. This might be like some of them B body Hedmans that fit with small dings. I've actually read where some people ain't had to dent a thing. But that's only using the low deck in the A.