Nice find!!!
I would definitely add a wide band O2 sensor. Just to see whats going on.
Like MetroMPG said I'm sure a warm air intake or some way to heat the intake charge will help you a ton.
From my own experience I have found to run in lean burn you need the intake temps to be very warm. It helps atomize today's poor pump fuel with the government built in low VOC fuel regulations.
Good luck on your project!!!
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