Cracks on "X" part of 1962 frame

[LuckyLightning]

I was crawling around earlier today under the truck while I was adjusting the park brake, and I noticed a few cracks on the "X" part of the frame. I'm not sure how critical this actually is, would appreciate some input on this.

This is the first crack I saw, which is right next to the driver-side trailing arm just behind the "X" crossing; it looks like it might have been welded up before:


This is on the same driver-side, but just in front of the "X" crossing (it's not just the rust, as I can feel the crack on the other side):


Here's another crack, right above where the wire goes through the frame (and there's a matching crack on the passenger side):


Please keep in mind this is not the outer section (box) frame, but the inner x-frame.

I have a friend who is a welder, and can probably get this taken care of when I planned to do my frame-off next year. Question is, can it wait that long? Do I need to be careful with the truck until then?

Thanks.