I used a modified chevy type disy the one with the coil built in to the cap and a module from a early efi chev I think their the same as a early holden camera .
But I have some new spares , I think they were only about $20. The better way to go is if you can find a early electronic disy the magnetic pickup type and use the chevy module.
The VN hall effect disys are also a option but I think you would also have to run the holden efi ignition module and the wiring gets a bit tricky.
At least with the magnetic type disy and the chevy module it is mimicking a chev 350 setup which is what the holley systems are designed to run.
Also there are some programmable outputs on the avenger and HP systems that can be used to control the lockup.
And the avenger software can be upgraded to HP over the net for free.