Gm turbo 400 and Chevy 350

Hey guys I have a gm turbo 400 I wanna put into my cj with a 350 v8. I was wondering what type of tcase I would need. The output shaft is a 4.5" shaft from the back of the housing. I read somewhere that the 205 would work and other people said the 208 would work. Need to know what will work best