I am a Southern Baptist in Texas. Even those that profess to be Southern Baptists are all over the map. The LBCF is a great place to start. (although most SBC Baptists have never heard of it) Here is a link to the SBC Faith and Message which is the most common document of unity you'll find in our denomination.
Baptist Faith and Message 2000
Good luck with your discussions with your friend.
In Christ.