Well, its my buddies car. im pretty sure that the 1g tranny wont bolt up... :/ but i found a site that kind of helps out a little bit.
http://www.roadraceengineering.com/1gcasin2g.htm
However im still not sure if anyone has done a 1g rear end w/ axles in a 2g, or if it would be any better, i dont know a whole lot about 2g's in general.