I've wanted to buy a cart for a while and finally bought a project. Everything is there but I wanna upgrade and give it the "hills package". The vin starts with a81. I know that tells me electric 1981. Now that's all I know I don't know voltage and can't find it but I assume 36. I've looked on sites and it's hard to find things for this year for upgrade. I know nothing and don't know what I'm really looking at. Any advice would be great. Thanks