Quote: there was an efi build years ago where they were using a milodon or keith black gear drive. Epoxied a magnet on the cam gear and mounted the sensor right to the cam cover.
Here's what I envisioned for a hidden 1X signal (I didn't really come up with this on my own). Take the cam sprocket and epoxy or drill and tap and attach with screws a 1X reluctor straight to the gear. Then attach the semi/flush sensor to the timing cover to read the signal. I plan to test fit this on my spare motor soon to see if there is enough clearance between the back of the waterpump housing and the timing cover for the sensor. This would a real clean way to get the signal. Here's a pic of a similar one (the large U shaped area around 180 degrees of the sprocket would act as the reluctor):
