1972 steering box interchange in 1973

[texas charger 73]

Can you use a 72 steering box in a 73 charger? I know the pitman arm size changed, but has anyone used a 72 box in a 73 and just get a 72 pitman arm?

[Nacho-RT74]

Not sure on the mounting angle ( that could make a diff ) but the pitman arm gets 4 keys since 73, while earliers gets a continuous symmetric spline pattern