When I build another my choice of engine would be SBF first for performance, look and reliability. All three are very possible with a SBF if it is built right. I personally am not a fan of the Coyote in a roadster due to looks out of the box. Some have enhanced it with some painted sections of the engine covers and that helps and then there are two I recall where one had stacks and the other had a custom aluminum cover and both looked very nice.

All this is my personal preference though as a I like the old school look and feel of a SBF. Modern engines definitely are nice but in my head they belong in a different vehicle but this is YOUR roadster so you decide what you want.