^^Wiso - great write up, reading thru you post, you state you used a Corolla C56 with MR2 Spyder Helical LSD with modified linkages to suit an AW11. I too am looking at replacing my old AW11 NA gearbox with one I currently have from a AE93 Corolla Seca (4age smallport).
How did you go about modifing the box so the linkages are on the other side of the box? It looks reasonably easy, yet some precision drilling looks to be in need.