The control arm mount itself needs to be replaced, not just the control arm. Fortunately there are at least a half dozen companies that make brackets that are much stronger than the factory ones. Basically chop, grind, weld, and paint.
You'll need to verify that the axle itself isn't bent. With the steering wheel pointed straight ahead, find a slot where you can reach the brake rotors with a digital angle finder. The two rotors need to be parallel vertically within around 0.2°. If they are not, the axle could be bent. Ideally you'll also want to check the camber and toe.
The easiest way would be to put it on an alignment rack and measure. Unfortunately any new alignment wouldn't be good until the control arm mount is replaced, so you'd either have to weld the mount in advance (taking a risk that the axle is already bent and you welded on a perch for nothing) or have an alignment shop measure it first, go home and weld the bracket, and then return for a final alignment.
Jack it up and check the tire and wheel for any unusual play up/down, side/side, and in/out. The ball joints should not clunk, and neither should the trackbar joints or steering joints.
Also, very carefully check the weld that joins the trackbar mount to the frame. This spot is notorious for cracking in certain kinds of collisions, especially ones that impart an oblique force to the wheels. One sign that this may have happened is if your steering wheel no longer points straight ahead after the collision. This means something has bent or broken somewhere. Often that is just the trackbar or drag link bending, but it could be something more frustrating like a mounting bracket.
If the impact was hard enough, also very carefully inspect the bolts that connect the steel engine block mounting brackets to the alumimum engine block casting. The brackets and bolts themselves are usually fine, but can tear out of the block or shear their way out of the block in certain types of collisions, especially head-on collisions.
Be sure to check your steering box for unusual play as well. Oblique forces can impart a lot of stress onto the steering box gears, causing internal damage or sometimes even for the box to separate from the frame.