904 freshening ?

I agree with Mrmopartech. 8-1/2 yrs. is a long time for seals to set. It may work or it may not. If it does work when you first install it it may not last long. Either way it needs a shift improver kit if your going to put 300 plus hp to it. I recommend the Trans-go kit. They are a little more work but they are well worth it. They not only improve the shift quality but correct some minor issues Torqueflites have.