Diesel & Gas Engines?
A deisel and gas engines are not really that much alike other than they both burn fuel and are engines. The basic components of the engine are different, but the transmission, alternator, water pump and some other accesories are similar if not close enough to be the same.
The fuel systems of the two are very different. The method used to deliver the fuel to the cylinder is very different. These differences are some very important things you would need to know.