I had it and the converter built for a 3200lb duster not sure what the hp rating is. I had it for a 418 stroker that was 508hp and 517tq and cope made it sound like it was no problem. I did the upgraded billet drum to try to strengthen it more. I have a boosted 6.1 myself and am around 550whp so I’m sure your more around 700whp. I could call cope and see what they rate it at if your interested.