The lower control arms should be about level or parallel to the ground while the upper control arms benefit from being angled towards the center of the vehicle. The upper arm should have more angle than the lower in a proper setup. If you were to map out the pivot points of the upper control arm and the lower control arm they should intersect at some point. A good compromise is supposed to be 100-150 inches long if you projected a straight line through the upper control arms pivot points and the lower control arms pivot points out to the side of the vehicle. This explanation works if you are looking from the front of the vehicle. And no, I do not know offhand of any spindle that will work for you. Good luck though!