That's exactly what I had in mind. Thanks. Any links?
Heater control valves are pretty cheap. I picked one up for another project of mine a while ago. It is setup to have a cable attached to it. If you look at the 'frequently bought together' it should show you all the bits you would require.
View my fuel log 2015 Mirage DE 1.2 manual: 44.5 mpg (US) ... 18.9 km/L ... 5.3 L/100 km ... 53.4 mpg (Imp)
This one has a bypass-
Or go super cheap and grab a water valve from a 70's ford then just use a choke cable and knob or throttle cable from a lawnmower.