Calipers are an unfinished project and will need anti rattle shims as well as guide pins and seals ; ideal project for someone with the skills , £30 as is or I can rebuild and clean however price will be considerably more , collect or arrange own courier
Just to clarify I'm not 100% that the back box is a genuine jap part , bought it from eBay years ago . It's been cut from the flange so will need welding to a stainless pipe flange etc