I just installed the Autoloc large bearclaw latches in my jambs because they are too big to fit in the doors with poppers and power locks and 1-piece window glass....
My plates are welded into place that hold the actual latch assembly. and the striker bolt plate is also welded onto the door. This seems plenty strong.
If you wanted to weld the Altman latch plate into your door it would be alot stronger, you would just have to make a new arrangement for bolting the end of your door panel in.