R33 brake upgade

I saw this on ebay and was thinking of bidding. Since it doesn't come with rear rotors, would stock 240sx rotors work with those rear calipers?
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=2473231511&category=33563#ebayphotohosting

Also how difficult would it be to do put these on my 98 240 sx?
Thanks