I haven't payed attention to this lately but IIRC there are two pump housings, one style for small block and one for big block I believe it has to do with the way the and shape the hard line as it exits the housing and there may be or not, a hose bracket I don't remember which is which to verify I have a correct one. I don't remember if this is one year thing or over all years. Theres a lot to this so I will stick to the reservoir housing for now. So I took a chance and looked on mustang tek and they have all power steering pumps listed but only a picture of one, HBA-BF which is for my application go figure.