Try here:
http://www.boydsworld.com/
This site has conference standings for D1 back to 1865, but it does not have stats.
Stats are hard to come by for teams. This site doesn't have D2 or D3 standings, but the NCAA has historical records for teams going back that far here:
http://web1.ncaa.org/stats/StatsSrv/...earchSport=MBA
Both of these are good for finding what teams were playing during a particular year, but do not have stats. Edit (NCAA site has stats back to 1990 I think)