I'm not familiar with Mazda's.

The functional description is as follows: the magnetic pickup will make an Alternating Current (AC) signal when the distributor shaft starts spinning. The AC signal is very low voltage, but the AC frequency will change as the distributor shafts spins faster and faster. The GM Ignition Module converts the AC signal from the pickup coil into a square wave that the TBI computer reads as a distributor reference pulse (aka Engine RPM).

The GM Ignition Module is very universal, it will accept magnetic pickup AC signals from all automotive pickup coils manufactured / imported to the United States after 1975, including the pickup coils manufactured by Mazda after 1975.

For an EFI conversion, a distributor with a vacuum advance will need the vacuum advance mechanism welded.

dave w