We have Voyager and are currently having BSLW process all our bibs every run so we can get changed headings into the records before they come back from BSLW.  After they are back, we do the global headings change process.  This still leaves some to do by manually which I assign to a parapro and sometimes to students.

I do think the additional tapes from Peter Ward is duplicating the effort as you will get all the authority records you need from BSLW.

You will have a ton of clean up to do with unauthorized headings and partial matches, depending on the reports you get back.  This is ongoing and as we work through the lists we are able to find authorized headings once we account for old cataloging, errors, etc.  We either search WorldCat or LC for the ongoing clean-up.  If we find a match and fix the heading in the record, we import the heading and notify BSLW to add the authority record to our master file.

If you want more detail about our process, I’d be happy to let you know.  Unfortunately, I don’t have a written procedure as I just haven’t had time to write one.  It was all new to me so I made it up as I went along and learned a lot along the way.  I’d be happy to help you avoid that steep learning curve.  Feel free to email or call.