Hello Bob!
MS requirements for SC ConfigMgr and OpsMgr are listed here:
ConfigMgr site server:
http://technet.microsoft.com/en-us/library/dd547071.aspxOpsMgr (about half way down page):
http://technet.microsoft.com/en-us/library/bb309428.aspxI would just make sure the server at a minimum achieves the listed requirements for both - obviously considering the disk space for ConfigMgr packages and/or OpsMgr specific file/logs.
/cheers