Just to correct some miscommunication...

I was told at first that the copper evaporator was made by ACM. This turned out not to be the case.
Fortunately, when I ordered, I asked if he had the copper evaporator, he replied 'yes' , then I said 'I want the ACM'.
I received the all aluminum ACM with the expansion valve and rubber collar.

Now, however, as I take a break with the dash out of the car I am wondering if I read correctly.

Is it 'if you replace the vacuum soleinoid, go ahead and replace the evaporator' or is it 'If you replace the evaporator go ahead and replace the vacuum solenoids'?

The system still has R-12 in it and still blows cold enough to keep it comfortable on an 80 degree day.

The dash is apart, and the evaporator is on the table. Put it in or not? I have to go get parts. Hopefully someone will chime in in the next hour or so.