Yes my chassis is to Saturn spec.
My front lower wishbones also have a bend in them, Talon made them that way because there was a problem with track rod ends touching the inside of the rim.
My upper front ones are triangular and only have adjustments on the upper ball joints.
My rear lower wishbones have adjusters, but the upper ones don't.
If your upper rears are very short compared to the lower ones like mine are there is only about 50mm of up and down movement, so I can't see it making much difference if you make longer adjusters because the wishbones are going to be where they are now but without only a small bit of thread left in the wishbones.