So I was looking through the service manual tonight, and it seems that the speed signal is interpreted by the ABS computer and sent to the gauge cluster directly, as opposed to being run through the PCM, so long as the car is manual trans. If this is correct, that would imply that swapping an MP3 or MSP ECU into the car wouldnt affect the speedometer readings whatsoever. Am I right about all this, or am I misreading the manual?