The definition of small engines modifications varies based on a number of aspects. For example, power outputs or fuel consumption.
You have to eliminate blind spots if you don’t like sticking your head outside the window during reverse parking to check the vehicle’s alignment.
Different engine sizes are able to assimilate modifications affecting fuel economy no matter if they are small engines or larger ones.
Most people do this for the purpose of improving aesthetics rather than to increase vehicle ground clearance. Wheel spacers make car appear of a higher vehicle ground clearance.