Couple points to consider since you have the windage tray out. You will not be able to peen the piece back in place properly. Drill, tap and bolt tightly using red loctite. If you can source a fastener that isn't completely threaded and has a small shoulder that fits tightly into the hole in the windage tray that would be best. Riveted pieces are done that way so there is no movement. Bolted pieces can slip due to the slop in the holes the fastener has to pass through.I just removed this tray from my 2 CB350 engines so that I could make sure that there was no heavy grit or unseen broken parts in there. No parts but it was dirty even after I did what I thought was a good solvent and soapy water rinse. It's quite a maze under there and a couple of "Pockets" required lots of brushing and picking to remove. I'll try to post pic's soon.
I used a Dremel tool to grind off the peened over edge of the 3 stamped "risers" and I feel confident that there is enough remaining that I can re-peen material on top of the riser to secure it when I put it back together.
One of the trays was cracked in several places but the screw heads were also stripped by the last person in there so I'm not sure if the cracks were from normal wear...given the condition and lousy work done I suspect that some of the damage was caused by trying to pry the tray out...he/she was unsucessful.
The other tray looked fine so obviously that's the one I'll be using for the final engine build.