Here are some links to other sites featuring Allis-Chalmers tractors:
The AGCO Corp. Web Site
Unofficial Allis Homepage
The Upper Mid-West AC Club
Old Allis News
http://www.hcea.net
http://www.robertsarmory.com/M7.htm
http://www.DJSTRACTORPARTS.com
http://www.TRACTORPARTSASAP.com
http://www.STEINERTRACTORS.com
http://www.WALTSTRACTORS.com
http://www.oktractor.com