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Yes. Technically you're supposed to replace those nuts on the upper control arms, but I doubt most people bother (including me). You just tighten the **** out of them when you put them back on.
It was a combination from above and underneath the car when I replaced the A arms. I was unable to use a tension wrench there wasn't enough room so I used a long straight ring spanner and a socket where I could get it in and cranked them up.
I will torque them properly when the engine is out.