Duster Parts?

I am in the process of doing the slant six to V-8 conversion on my 73 Duster and am looking for the following items to complete: (I am located in Southern CA, the closer the better).

Good/ buildable 904 or 727 SB transmission
Complete a-body 8.25 or 8.75 rearend
Pr. large diameter torsion bars

Let me know what you have, thanks