UCA mounting bracket damage

If you can get to a welder repairing them shouldn't be that bad. First make sure the mounts are where they're supposed to be, then weld them back together. Then I would overlay the bracket with a flat piece of steel connecting the upper and lower parts and weld around the edge. In the one picture it looks like you could also reinforce the back side with a "L" shaped piece of steel for added strength (connecting the mount with the upper surface of the frame). Just welding the mounts back together won't make them strong enough as I mentioned earlier, the metal around the cracks is highly fatigued, the welds would just break again over time (or rather, the metal would break away from the welds). The plate would probably take care of things, but I like overkill. Also, it looks like the mount may be damaged just below the A-arm bolt too.

You might be better off getting a piece of steel channel or "L" (1/8" or 3/16", measure the thickness of the original) and just re-creating the mount, although you'd obviously have to take a ton of measurements to make sure that your suspension geometry ended up right if you went that route. If you did your homework and spent some time making the part it could look close to stock, the plate repair obviously wouldn't. But the plate would be a ton faster.