If you are running the stock T56 bellhousing + hydraulics, I believe you would just need the same adapter used to adapt a Saginaw, T10, Muncie, etc. to an LS motor.
http://www.ls1tech.com/forums/conversions-hybrids/1081557-gm-extended-pilot-busing.html
More specifically, http://www.ls1tech.com/forums/11237712-post8.html