hi there have anyong put a Air/Fuel Ratio Gauge on the datsun im talking a car with webers and no O2 senor

I have an EGT and O2 sensor. It's easy to add if you like wiring. They are very useful for debugging and tuning, and if you have a weber, you'll need to do that.

fitting the sensors will require a little creativity, but it's doable.

Wasn't there an autotune module for weber carbs once? something of that nature would be ideal. in the oem carb with an o2 sensor, they used the anti dieseling solenoid to make the car go lean.

I use an a/f ratio guage on the side draft fed race engines.Any further info could(how to,where from etc.) be irrelevant as your location is not in your profile.