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U can sort of retune speed pulse signals in the ecu
Then u have the output signal from ecu drive yr speedo

Having one sensor drive the engine ecu and speedo can have slight issues and one might drop out at high speeds
Just depends how strong the signal is
It's one of those try it and see
I've had guys think about using abs sensor to run abs and signal to ecu
I say not sure what will happen just try it and see if the abs has errors come up