Quote Originally Posted by 85Ram50 View Post
Why would they send a carb with the wrong jets? This is the one designated for my truck/motor. Off the top of my head its the K610 kit.
They're generally jetted for 2.6 applications. If the jets are too big it would explain the poor fuel economy and not a great improvement in performance from the get go. I don't know the policies of the vendors that sell them but unless they have some way of allowing customers to pre order the size of the jetting, it will be up to the installer to set it up specifically for their application.