From my understanding it's going to end badly, very badly if my knowledge is correct of course.
AFM's cannot measure the density or the speed of air, simply the volume of flow. Moving it post turbo will cause it to measure the flow of the air after it's been compressed and not the volume of the air since the AFM cannot determine if the air is compressed or not it will most likely run lean, pre turbo it measures the flow of uncompressed air.
I could be completely wrong through
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