This Maytag 640C dryer has a terminal block for a 240V plug, and it looks like there a a vent hook up on the back.
http://www.automaticwasher.org/cgi-bin/TD/TD-VIEWTHREAD.cgi?72603_11
http://www.automaticwasher.org/cgi-bin/TD/TD-VIEWTHREAD.cgi?72603_11