A productive visit down to Adem at Ergen Motorsport today. He has done an excellent job with the engine wiring (it was brilliant to hear the engine running!!) but was rightly concerned about the rest of the loom, which wasn't a great job by myself to start with, and subsequent tinkering and hacking has rendered it impossible to decipher and in a potentially dangerous state.
Given further that my original dash and gauges have deteriorated significantly whilst in 'storage' for the last 5 years, Adem has agreed to source an E36 loom and clocks which he should be able to install, just leaving me with the lights etc to wire up and an original E36 instrument cluster to fit into a new dash.
Although this will mean much extra work and expense, it must be justified in order to ensure a safe and tidy final job.