I also run an 8-3/4 but behind a Hemi with a manual trans if I was going to race it with stickies I would definetly upgrade the 8-3/4 as I think it may break in time behind that combo in a manual trans. I believe the Dana's are actually cheaper then the Ford 9" but I do like a Jackpot rear when it comes to working on them as I like that you can take the jackpot out and work on it on the bench. I want to upgrade to a Dana myself one day if I ever get the money. Ron