If to run as a fuel full time, the entire 100% of the fuel system must be compatible. Pump, tank, lines, fittings, sending units, filters, injectors, fuel rails, regulator, feed lines, return lines, o-rings, etc etc etc etc..
I dont think you'll find a conversion "kit" for the GN due to the issues stated above.
I'll let you find some 72's alcohol compatible.. start there