Ok, interesting... It would definitely run but was really rough with absolutely no chip in it. Almost like another Z I had before with a bad MAF. Lots of smoke from the exhaust, running really rich etc. Poor throttle response. I had to put my foot on the gas pedal to get it to start at all.
I had kind of assumed that it would need to have a chip in there too so i was really surprised when I pulled the ECU to find only the socket!