450 horse tranny build

[hainesboy]

Im looking for a good kit to work well with 450-500 horsepower. Ive done a bit of research and all the companies and reviews say "this is the best!" I would like your opinions. Im kinda leaning toward goerend. Also being a rook in the diesel world im not sure if my tranny is the 47re or 47rh. 97' 12v auto.

 

[fearthedeere6.7]

Should be an re and I'd go goerend.