Hardly any more than you would normally do to get the 3:1 cooling and when the bottom is facing you all you see is the engine block since everything else is black.

The valve covers are the only thing sticking out the side. The cutouts in the front of the cowl are a perfect match for the air getting to the head. I had a cowl that the front cutouts were not factory cut so I only opened the side where the engine is.

The pump is needed because I have the tank real close to CG so it's to long of a run for the fuel.

I also use 30% nitro in my Saitos and YS engines so power is not an issue