/6 904 TC behind a 318

I have been looking for info on this but could not find any, But I saw where another member here was selling /6 TC that was bolted to a SB flex plate to install on a 318. I guess the question I have is will this work and or what if any benefit will this do?
The only reason I am asking is that I have a spare /6TC still in my shed and if there is a good benefit I might looking into trying this swap.