According to cfbdatawarehouse.com the Big Ten teams vs SEC school records are the following:
Ohio St. 7-10
Mich 20-5
Mich St. 5-6
Indiana 26-21
Illinois 2-6
Minnesota 5-3
Wisconsin 4-8
Penn St. 16-6
Purdue 4-5
Iowa 4-3
Northwestern 2-5
That is 95-78 in favor of the Big Ten. I don't know if all those games were while the teams were in those conferences though and I believe it is
Read more: http://wiki.answers.com/Q/What_is_the_all-time_Big_10_vs_SEC_record_in_college_football#ixzz18QUr9RSp
Editor's Note: Hi, thanks. If you read all the way through our SEC vs Big Ten page -- it explains exactly how we got our numbers. Just depends on what's the best games to count.