does anyone know what the early models of kubota engine blocks are made of ? are they cast steel .? or are they cast iron ?...i have a kubota L225DT,and im wanting to know,does anyone know what other kubota engines will interchange with the model of tractor i have ?,could i get a another complete engine to the front drive systems from another tractor model to bolt up to my existing bell housing of this tractor !? more questions>,,,it has a loader and is there any other way to bolt the loader to the tractor to reinforce the loader to take off the strain of the front differtial ? NEED HELP !!! johnnybebad60085@yahoo.com