Wiper arm length, sweep and orientation

Hi,
i am about to order parts to get the wiper installation going.
I have measured that i have an area of 170-630mm that the wiper kan work on atleast, wich should result in a 400mm arm, and 450mm blade.
But i still want to ask you other builders here what length combination you used, and more important how big sweep you have on your wiper motor (seems gap in hood is 110°, but i think i can manage to squeeze in 120°+ there)

Also, i was thinking i should use a left cranked arm to make the parking position towards the passenger side, correct?
 
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