Can anyone help? I have a lovely 1988 XR3i but it is seriously lacking something. For this reason I'm treading the path thousands have trod before me, you guessed it, engine transplant!! Now the obvious choice is the RS T lump in standard form to modify later. The problem I have is the wiring, what do I have to change or do to wire up the ECU's? I'm going from MFi 3i to MFi RST. Is it a complete loom change or is there a quicker way?

PLEASE HELP!!!!!!!!