Is it possible that a 1973 A body K member

can fit 1970 A arms , LCA and brake setup ? Is there a way to tell which k member I have if I post pictures of it ?
The only things attached are Torsion bars LCA upper control arm , spindle and brakes , seems to be SBP rotors , but k-member has the openings underneath , unlike my 70 k member which is closed underneath . Will try to get pictures . 73 k member with 70 brakes and control arms ?