I have a 1967 oc4 desiel for sale. it runs perfectly does not burn a drop of oil , but needs some work. the tracks are in good shape ( I have street pads on it). the clutches are bad well one side. it also needs new leathers on all the rams and one stem(the tilt ram has a bad stem) I have a coustom trailer for it that is included with the dozer. I also have a planitary steer unit for it. I talked to zimmerman cletrack and they said they would trade me parts if the unit was in good shape (and it is) so if you wanted to put clutch steering back in it you could for free and a little time. I am asking 3500 for the dozer and the trailer.