headman headers

I bought a set of headers for my son's 68 dart gt with powersteering and auto trans A Year ago.They worked really well I decided to do same to my 73 dart sport. All specs say no p/s and fits Manuel transmission. Any one out there bought headers for an a body with p/s and Manuel Trans ? From headman with this combo? I am going to research at summit my purchase hopefully I get some where.
Thanks Bill