Hi mshavandy, I'm new here also, but not new to Olds. I have not personally laid eyes on a glide connected to a 455, however they did put them on 350's and the bellhousing mount on 330-455 is the same, so it is only a matter of making the linkage work after that. As to why? Who knows. I'm sure we have all seen our fair share of "What the?"
in our time. If you don't want the glide, Summit Racing or lots of places provide th350's or th400's. Enjoy that Olds!
Kevin