Jeff Liebermann wrote:

For such contortions, I recommend an open end
crowfoot wrench:
https://www.google.com/search?tbm=isch&q=open+end+crowfoot+wrench

Yuk! Looks awful! I hope I never have to
get/use that! Never saw one either so they
cannot be that common. Perhaps more common in
other fields of mechanics like cars or
even aeroplanes?

--
underground experts united
http://user.it.uu.se/~embe8573