T5 in a /6 Valiant

There is nothing commercially available to mate a T5 to a slant. A few years back there was a group buy over at slant6.org for some kind of adapter to mate a T5 to a slant overdrive bellhousing. The bellhousing needed some kind of modification which was part of the group buy. There is a member over there (posting over here as well) who is working on an adapter kit to mate a Nissan 350Z 6 speed to a slant. Your best bet right now is to use the 833OD.