Adjustable Proportioning Valve location

[XLexusTech]

i have this crazy idea, I was thinking of mounting the adjustable prop valve to the engine side of the firewall positioned such that i could run the knob stem through the firewall.
Then I would extend the knob stud with a support of course such that i could have the actual knob on the dash.
First has this been done? If so Pics for examples?
Second does the valve have to be mounted in a way that makes this impossible... Most valves i have seen have the knob vertical...



thanks in advance....

BTW the goal is to have access to adjust the balance realtime.. say for example if I am on a long road course.