Re: Right or left prop
Look at which way the prop has to turn to pull itself forward. If it has to turn clockwise, it's a right hand prop. If it has to turn counter-clockwise it's a lefty.
The trailing edge (straighter of the 2 edges) on a right hand prop will be on top when it's on the right side. The trailing edge will be on top when it's on the left side for a left hand prop.