Picture Please

the position is really not that critical, the sway bar end links can take up small variances on where you weld them in. I would install the lower control arms and the sway bar to the frame mounts. then install the end links. With the car siting in its natural position, then Position the lower control arm mounts so that the sway bar end links sit straight up and down. the welder that you are going to use would easily set that up for you and weld them in. Even the angle iron that was suggested would work just fin, just ask any welder.