I couldn't leave this alone
If your trying to put that kind of horsepower to a 2004R you better be married to CK's daughter or equall.
If you are going to run in the low 10s or 9s you will eventually go to a TH400, unless you have lots of money. You do the search.
After having several of the above named transmissions I gave up and went with the TH 400. Should have done it the first time.