They will take your primary cluster and can reprogram the mileage on it to the new dash. As I recall the cluster should be specified to them prior to they buy your new just one. You simply have to have to interchange your switches. There’s a great youtube tutorial by https://mushroomchocolatebar31852.ezblogz.com/63661161/5-tips-about-mustang-gt-with-digital-dash-for-sale-you-can-use-today