I cut the wheel well arch where I did (at the peak of that ridge) so that I would only need to do one bend, and for the ridge I can just have the patch welded on at that angle.I was wondering what you were planning with those bends.
Generally it's best to form all of that on the patch panel before you weld it on. I've probably covered how I did it in Canadian Psychos LType restoration thread. You should be able to do it still with vice grips and a couple careful cuts. Make a cardboard template of the part with the shape and cuts figured out then trace it on.
I think the folds around the lower part/rocker will be harder, I was waiting to do it so I could hold it up and cut and bend with everything else in place and get it decently close. Either way I'm gonna need to think about it before I do anything hasty.