if you are going to take it all apart I would disconnect the high pressure lines from the pump down and pull them out a little bit before you disconnect them at the rack.

otherwise it's tight, real tight. soak them with blaster and hope you dont strip them in the tight area. if you can get a adjustable wrench in there to break the initial seal then an open ended wrench can work.

I had a hard time getting the flare wrench at the right angle to even make it useful to work. if you don't have one and plan on buying one, I recommend the ones with adjustable heads so you have more angles to work with. they are more expensive but would be worth it on this job.

the top middle bolt is also kind of difficult to get out and can't really use a socket on it very well. you can loosen it with one, but then it gets progressively tighter as you unbolt.