I did just notice the part about the Monte knuckle is a 1 piece. If it is, then I am wrong about using it. Monte '72 should have 2 piece knuckles. Perhaps you have '73 parts, or my info is wrong.
this is the list i have:
Apollo 73-74 Buick Special 69-72 Camaro 69 Chevelle 69-72 Firebird 69 Grand Prix 69 Grand Prix 70-72 Monte Carlo 70-72 Nova 69-74 Olds F85 69-72 Omega 73-74 Sprint gmc 71-72 El Camino 71-72 Tempest 69-72 Ventura II 71-74
He is using '72 Monte Carlo brakes on his '67 camaro.
Steve, I apologize. Read thru David's site, he has a lot of great info.
edit: I have the part # for the knuckle as 3966151, fitting "GM “A, F & X” Body, Mid-size GM Nova Camaro 1964-72 1968-74 1967-69" But, I also have that # as being the Chevrolet #, while the Pontiac # was 478171 for the 67-69 'bird, 69-72 GP, and 67-72 Tempest. The difference being the diameter of the bolt holes.