Suspension and frame work, cracked LCA, advice welcome

I be damned if I would try to fix that. Really difficult to determine where the end of the crack is. If you repair it without finding the end, it can keep cracking. Not the kind of thing you want to fail. JMHO.
Well, I have no option besides finding the end of that crack and push it a bit beyond... what makes me think... I love your avatar pic...