What do i need to make a 1987-1993 5.0 transmission fit my 65 mustang?
Money, and somebody who has done the change, to help you. Try you local hot rod shops. If you can do the work and have the tools, just start doing it. First check with some transmission shop to see if that tranny will bolt up to the engine you have or if you will need an adapter, they should also know what all you will need for the change over. Half the fun is making it fit.