SCSI available for 3640/3670?

[Patrick Tufts <zippy@berry.cs.brandeis.edu>]

Still more newbie questions:

   Has anyone built a SCSI interface card for the 3640 or 3670?  

   Is there any way I can get copies of the field service manuals
      (or other hardware manuals) for the aforementioned machines?

Thanks in advance. 

--Pat