Bellhousing question?

I am trying to mate a tremec t56 to a 360 and am looking for some help. I have been unable to find a bellhousing to do this.l Keisler says they have done it but do not have any parts avaliable to the public. I have heard that the new Hemis share the same bolt pattern as the LA engines but I dont know if it is true? I also heard that the new hemi and the viper share the same pattern. If that is true I can I use a viper bellhousing to bolt the t56 to my engine. Please help.

Thanx
Nate