Anyone have a DIY on this or can explain. Do I just unbolt the old one and hook up new one? Is this a DIY or should i take to shop. Any tips or hints i'm figuring it might get messy. Is there a lot of fuel suppose to spillout or something? I might take it to the shop if it is too messy or a lot of hassle. I'm thinking its pretty simple. How much labor should i be charged?