Dual fuel question

[DGA]

I have a need to be able to use two fuels, either Avgas 100 octane low lead, or premium automotive pump gas. Does the E40 ECU have the ability to recognise this? For future engine choices I will use the LS3 or LS7 (using the LS1 right now). Could the ECU that is normally used with these, new crate engines do this? If so, what is the sensor, something you add to the fuel plumbing, and can it detect just different octanes, or just go off knock retard, or how might I program the ECU to do this?

[Mep_q8]

If i remember clearly frost had a dual map LS1 pcm going.. simple as a flick of a switch.