All help forums, on various sites, say one way to connect a 2.9 block to a c4 tranny is to use a C5 bellhousing. My A4 has gone belly-up for the third time so I'm making this swap. (I only have about 60k on the 2.9 rebuild or I'd swap engine and tranny both.) I have one question: Do I need a specific C5 bellhousing or is one better than the other? i.e.: RF-C5AP-7976-A (Aluminum) (my preference) c5ta 7505 b 390 (cast iron) C5TA-7505-B (cast iron for 352 360 390 410 427 428) C5TA-6394 (cast iron) C5TA-6394-A (cast iron small blk)
