It is definately part of the frame because he took it all apart over the weekend. I will see what I can do about pictures but it probably will not come out very well.
I believe the crack is 5-7 threads into to frame. I also believe this is the only threaded part of the frame if that helps you figure out where it is located.
That is a tough one. I would need to see the pic to confirm where on the BB shell it is cracked.
If it is what I think it is, the frame would have to be stripped. Then bevel the crack, cold weld with high strength rod, cold water quench between passes, then let is set for a week.
After setting(assuming it is 6061 alloy), the BB shell threads will have to be chased and you are ready to reassemble.
Ask your hubby if he is prepared to proceed in this manner.
'90 Offroad "Proflex"
'97 Proflex 957 Large, '97 Proflex 957 Small
'99 K2 OzM, "98 Proflex 4500 frameset
'00 K2 3000, '00 K2 4000
'02 Serotta CSTi, '95 McMahon FS