if i bought the superchager that tiger88 has listed, he said comes with everything needed to install it, but if i wanted to add a 7th injector and fuel system how much would i be looking at and exactly what would i need, also it comes with the stock pulley is that pulley good enough with an upgraded fuel system or would i need to get a better one.. if so how much would that run..in the end would it be worth it?