what all do i need to upgrade?

[Huntinhauler]

i'm thinking about picking up an electric ezgo, with dead batteries, so my wheels got to turning. i initially ruled out ezgo's because they are 36v, but i know that they can be upgraded. i have read a lot about the conversion, but everybody's needs seem to be a little different. my main concern is having extra torque. i am not worried about top end. so if i lift the cart and want torque, what all would i need to make the conversion over to 48v?