personally i'd sling it back to the seller as item not described; the compressor housing is not a t34. Unless he said it was a t34 internals with a t3 housing i'd say its item not as described.

Assuming you still have your original t3, i'd send that away to get modded to a t34 spec and that way it will have a rebuild as such....its better than buying something off ebay which could be in need of a rebuild anyway

if you dont have your original, PM me