67-68 Inner ac/heater box.

[blownonfuel]

Hello. Do the inner ac/heater boxes interchange on a 67-68 Camaro? I have a 68 that i need the inner box for and found one off of a 67 but i'm not sure that will work on my 68. My car is an original a/c car and I am trying to get it period correct.

Thanks as always.