Yeah, but Johnny, it don't start at all.
I'd be looking closely at whether the fuel fail is plumbed up correctly. In vs out, damper & pressure reg.
Check the ignition timing while cranking. It needs to be in the right ballpark.
Does it need the chip tuned VG ECU because of mods? Why is it there? It's just one more way that it could have problems. Is it possible to throw an RB25 ECU at it? (Probably not, would be my guess, because of loom plug differences).