When you start swapping parts like control arms & spindles in places where other control arms & spindles were mounted, you can screw up the front end geometry real quick, which can give you a very ill handling ride. If your changing control arms, change (or duplicate) the frame section they were attached to as well.

One of the reasons the frame swap/clip or aftermarket sub-frames are popular is because the geometry has already been figured out (or was suppose to have been). Gene