I have recently become the owner of an OC-4 with a 3 cylinder gas engine.  It is not home yet,  but I know that the pistons have been removed from the engine prior to my owning it and that the engine pretty much shot.  The rest if the cat us pretty nice.  

    I am wondering if engine kits are avaliable,  or whether I am better off finding a running parts engine to replace mine.  

    Also,  would the 3 cylinder diesel be interchangeable with the gas engine,  or would serious modification be required?

     I have not owned an Oliver crawler until now,  so I am pretty new to the Cletrac scene.  Mainly I have JD wheel tractors and Cat Dozers... Thanks in advance for the help!

                    Chris