Stu,
1- TPS is 2wd one with wires reversed (so I have been told) - ran perfectly fine with that before I had the head reconditioned.
2- not sure what you mean here When I took the head off, the inlet manifold, plenum, etc... came with it, I don't remember removing any wires in that area - do you have a pic I could compare against ?
3- Nope - Beru
4- Only ECU change I am aware of is a Power Engineering phase 1 chip. How can I check if the board is standard or pectel ? She's a 1991 4x4 if that helps.

Thanks for your help, this is really doing my head in...