Well I did get it running but had a few issued with the Variable Reluctor type trigger.
The idle was terrible and I didnt want to spend the next 50 hours troubleshooting.
The older Haltech units seem to have issues with VR sensors and 36-1 or 60-2 motronic style triggers. Very prone to picking up noise - ignition or alternator source.

So - the VR sensor went into the bin after being smashed to pieces with a large hammer!

That was very therapeutic.

I purchased one of these Hall effect sensors (which do not require magnets to operate).
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Wired it up to the Haltech and used the internal pull up resistor in trigger set up.
Fired right up and idles nicely!

Now all is well again.