Transmission Brace

I do not have the braces on my 340/727 in my drag car and have not had a problem yet(been running the car 2 years now). I have solid engine mounts with a stock trans mount also. Maybe the 727 has a thicker case?

If the crack starts below were the lower braces would attach it would not change a thing to install them, it would still crack. Now if the crack started somewere between the braces threaded boss in the bellhousing and the block then yes it would make a difference to support the lower part of the bellhousing.