Can Thermoquad throttle plates be exhanged from different years?

I have a '72 ThermoQuad (6139s) but purchased a NOS '73 charcoal vapor canister that uses a hose from the base of a '73 ThermoQuad (6319s). If I find a used '73 TQ, can I just change the throttle/base plate over to the '72 model so I will have the correct vacuum fitting? Thank you.

1972 Thermoquad.jpg