You seemed to have dived into it mate, could I suggest a step back.old school style.
Is there a spark, is there fuel in chamber, is there compression ,is there air drawn in.?
I'd have thought if nothing's been touched since last ran, if u put capful o petrol down spark hole it would cough at least?
Do u have cosworth friend that would swap out ecu for two mins?
I'd suspect a duff sensor/ crank gap,lead.
But tbh if you're already at pin testing then I'm talking Boloks and your way past me mechanically :-( so this thread is only helping by bumping up