To add to what tibadoe, and tbplus10 has said. Another big improvement is to do the big 3 up grade. The wire from the alt to the battery is small. By adding a large wire (with a fuse) from the alt to the battery, and one from the chassis of the alt to the neg on the battery, this will allow for the alt to flow a much larger amount of electricity back to the battery. Also from the battery, the same large wire should be run to the engine block. This is the big 3, but it is also help full to add 2 more ground wires. Both from the battery, 1 to the frame of the truck, and another to the body of the truck, making this a big 5 up grade. I did my Chevy truck like this several months ago. I used a #2 welding lead as my up grade wire. There are a lot of videos on you tube about the big 3 up grade. Keep in mind in simple terms, electricity flows like water. A bigger the wire, is like a bigger hose. You will get more out of it, than you will a smaller hose, or wire.