The Top Loaders are also called a 3.03 those 3 speeds and 4 speeds are very strong plus they are also syncrow in 1st gear lots more fun shifting than the older Transmissions. They normally are used only on the 1966 & 67 up duel bolt patteren blocks. But if yourare able to find a 1964 / 65 Ford Econoline Bell housing these were a specially made bell used on the 144 for the new for 1964 3.03 Trans and it will then bolt right up to your 1965 Block with the flywheel & clutch that you already have as well as use your 3 on the tree shift linkage too. Another choice is to use a T5 5.0 Mustang Trans with an Adapter plate then you can bolt that up using your bell housing and everthing else too.