yes another torsion bar/air bag question

[60chvstepside]

ok i'm having a bit of a problem/dilema with my 60 gmc.....i think this truck has been lowered before(rear frame was been clearanced for the frame to drop with air bags)now for the front,i'm curious if i can just remove the upper and lower A arms and replace with ones from a 82 chev pu.....the current cross member that is in there now has a plate across where a coil spring would go up into the cross member(on the upper part)and my buddy built a plate on his front cross member just like what i currently have and installed airbags with drop spindles.i'm thinking i might have a newer cross member in there,so maybe if both upper and lower A arms bolt up i'll be ok?
hope i didn't make that to confusingi can try to get a pic if it'll help at all