You talked me into it. 727 to a 904
IMO a trans swap from a 727 to a 904 is not worth it if you have a 727 already. Could probably lose 2 tenths (at the most from the swap) in ways much cheaper and easier than swapping a trans, and still have the strength of the 727...JMO
Wish I built a 727 instead of my 904...It has held up so far in my heavy *** car, but I worry about it constantly