Ford Tractor 4 Cylinder Diesel Head – casting # E6NN6090AB. That may be the only good thing about it. It has broken off studs / bolts all over, that will need to be drilled out and removed. It will need a complete set of valve seats, valve guides, valves (all of them), along with springs and retaining hardware. It also has an injector body that broke off mid-stream, that will need removal. May be more issues that I don’t remember.