Heater box swap

I am still looking for an answer to this. Im hoping someone can chime in.

I did a google search, and from what I can tell it looks like the 70 controls have 3 cables? My 70 box has 3 "blend doors" I don't have the 70 controls to compare to the 74 controls though.

To recap, just wondering if the 74 controls will control a 70 heater box. Non AC on both.

Thanks again!