Using a GM HEI module on a Datsun distributor

The Datsun 240Z, 260Z, 280Z and 280ZX are often fitted with an electronic distributor with a “matchbox” ignition module. Finding a replacement for the original ignition module when it fails can be very difficult.

To get around this a GM 4 wire HEI Module can be used as a replacement.

The original ignition module will have two wires(Green and Red)

To fit a GM module as a replacement the following should be used:

GM Module pinout:

W — Red pickup wire from the Datsun distributor

G — Green pickup wire from the Datsun distributor

C- Connect this to the negative side of the coil

B- Connect this to a switched 12V + signal

It is worth noting that a conductive thermal paste must be used in order to mount the GM module, as its body is chassis ground.

A custom heatsink mounted to an original datsun distributor. The HEI module is then attached to the heatsink.