Flipping Upper Control Arms, Problem??

[TurnNBurn]

I seen this in a past post. I am having great trouble with the upper ball joint
binding, It is at very sharp angle. Well, I tried to flip them like the ones that are shown on the first thread. But the ball joints do not even fit in to the control arm like that. What am I doing wrong, do have to cut rolled edge on A arm and weld new edge on??. I thought maybe grind balljoint, but I dont really like that idea. any help btw its an 82 2wd C10