I will just paste the reply I sent you from your same question on the web site.
This would require custom code to make that work and I don't have plans for this.
Also, I must say that this does not look like a very good board design. It uses an analog multiplexer which is not designed to deal with the very small signal from a thermocouple and a thermocouple amplifier which is not directly connected to the thermocouple (as was mentioned on the msextra forum).
A thermocouple signal is very small, as I mentioned, and has characteristics that are dependent on temperature so it needs dedicated chips that do temperature compensation. There is such a chip on the board but it's not directly connected to the thermocouple. So I have no idea how much accuracy this board would have nor how repeatable the results might be. And I doubt anyone can tell you either.
And this is also a very slow setup. It only does one measurement per second for each of the 8 inputs. So you have a very slow refresh rate and each measurement is not for the same time for each input.
So this might look like a nice and cheap solution for 8 EGT inputs but I would not rely on it. You will get some data from it but I have no idea how reliable that data would be and it's at least an order of magnitude slower than other known good solutions.
As for the JimStim, you should look on the
DIYAutotune.com site.
Jean