Hook up the governor electronics and test the readings. I only got around 25% with the stock placement. The GV Mount holes for the sensor were too high for me. I slotted them down further to be able to adjust the height of the sensor over the magnet. Other people are putting spacers in the magnet holes to raise them up.

Test the clearance of the fan by spinning the crankshaft and see if it hits the fan shroud.