The Radio Information Board

Can I use the icoms out of a GE MVP on a GE MASTR II? If not, does anyone have icoms for the MASTR II? Can anyone re-crystal my icoms for my MVP?

I have a Midland 6 meter mobile radio, model 70-050c, that I bought at a swap. It has a board in it with a on/off switch (s601). The board # is z-289a. It looks like a audio board. Anyone knows what it is, and what the switch does?