Questions on engines (Car Mechanic Simulator 2018)

1) If the car is the engine OHV V8, is it possible to put another engine, such as V8 or other V8 With OHV and how to do it?

2) How to change the intake manifold on the engine? For example on V8 OHV 1 carburettor - how to put 2 or supercharger? Spare parts for this is the principle of their compatibility is obvious - how is it in practice to do in the game? The game gives no choice between alternative parts of different types and allows you to put on the engine only the parts that were on it when parsing. So, the game does not allow you to put on the eight other head even if the type they are combined.