Well I cant find the correct tq arm mount i did find this however.
http://www.summitracing.com/parts/BM...9/?image=large it looks like it would work it says it works in the 200c at first then says 2004r which confused me since i dont want to spend 100$ on a thing that doesnt work.

Currently i have a 200c transmission in and am wondering what is the correct torque arm mount i will need to put in a th350

 

Thats the right one. You shouldnt need that piece for the cross member because I think the trans are the same length and your cross member is fine. Not quite sure how that piece for it would work either.

 

ty for response you answered my other post about replacing the xmember good thing i dont have to. TY for your response.

 

I have that B&M kit, makes for a good pain in the rear in terms of the speedo housing that uses a a hold down clamp, not a lot of fun to remove & replace. If there were length problems with a torque arm, my suggestion would be to fab up a mount and weld it to the tranny crossmember/trans tunnel.