This is not correct. There is no diff. in braces from 904 to 727. There is a difference in length of the braces used on the older blocks vs. newer ones (not exactly sure of the year change but it was around 74 or 75) because they moved the pad on the block where the drivers side brace bolts up. The pass. side braces are all the same length. I know all this because I just went through it. Took out a 79 360 and put in a 73 360 and the brace mounting point on the block was farther back so I had to get a new dr. side brace and the one I got was off a 318 with a 904 trans. and fit perfectly on my 73 360 and 727.
Mopekid I have an older shorter version I welded an extension to if you still need one. Your welcome to it, just pay the shipping which I'm sure will be less than $10. PM me if interested.