Universal's Atomic 4 is a gasoline engine. Universal makes diesels and made diesels that fit the footprint of the A-4. Are you sure your old engine is a diesel? And the rebuild, if it is a diesel, may fit the footprint of the A-4 but it will be taller and may not fit in the space. If you are replacing a gas A-4 with a rebuilt gas A-4 everything should fit with no problem. If you are replacing a gas with a diesel their will be changes in the prop and the fuel system and you will have to replace the exhaust system. All of this is expensive so know what you have and what your getting before you start.
Last edited by fordo; 02-13-2011 at 08:52 AM.