Has anyone installed a A518 Transmission in their Abody?

Just curious how many people have done this swap? I know its a bolt in for the small block in a B or Ebody, just wire up a pressure switch. I did it in my Challenger, best upgrade I did on it, better than the 3rd gen Hemi for sure.

Its a pretty easy straight forward install, but I know you need to do some cutting for the floor in an abody.

How much stretching of the floor is required?