There is one coming here on '68 Charger with (I think it is) 572 Hemi.
I have talked this over with the owner of Camaro that is in my garage. In Sema TCI sayd that they will give it guarantee for 1000hp.
https://www.youtube.com/watch?v=oW0LyOvVjl4"]www.youtube.com/watch?v=oW0LyOvVjl4"]https://www.youtube.com/watch?v=oW0LyOvVjl4
But for that warranty you have to use they own flexplate and specially custom made converter.
But looking deeper this thing it's still just 4L80E that at the end 4 speed gear ration just has been divided with new program to 6sp than normal 4sp. You get this cheaper just use normal 4L80 plus GV overdrive unit and you get 8sp.