DECServer 500/550 Manuals - PDP 11/53

Anyone have manuals for DECserver 550's. I aquired two via ebay, drove about 320 miles rt for pickup. I have one MOP loaded already but would like to find some owner/tech manuals for reference. I have googled and looked in Manx and other archives, but nothing seems to be available. I would like to convert the other to a PDP 11/53 as both have the 53+ cpu's. As for the conversion to a PDP11, can I use a TK70 tape drive?, most I have seen have TK50's. What cards can I use? such as memory and disk drives. My memory is kind of fuzzy with PDP 11's I have not done any serious work on them for about 20 years. I remember the first one was a 11/03 (V03?) and the last was a 11/83. OS varied from RSTS to RSX11M+ I found the site(s) that detail the DS550 to PDP11/53 conversion, most conversions have MFM type drives, can I use DSSI such as a KFQSA? and what type of ethernet controller? TIA, Dan Snyder