Diy right control arm replacement Problem

I have ordered an OEM control arm and need to replace the aftermarket arm that a shop put on less than 2 years ago. Aftermarket control arms are not worth the savings! Get OEM. I am having a problem getting the front bushing bolt out. It hits the engine oil sump. Anyone run into this problem? I am thinking I will just jack the engine up to get it out of the way. I am used to working on old Volvos where this would not cause any damage but I just wanted to check before I try it on a front wheel drive.
Also another thread mentioned taking the axel nut off, but I can't see any reason why you would have to do that to replace the control arm?
I detest the local Toyota dealership and am trying to avoid taking it there.

 

I'll try to load a pic tonight. It not like the camary control arms that have a removable bracket for the front bushing. The bracket on the Prius is part of the subframe and a long bolt goes through the bracket and the bushing.