Just read with interest post about changing a Di engine to a Tdi. I was thinking of changing to a turbo engine in a lwb 1992 onwards. So this is not possible then, or at least difficult (and / or expensive to have done) because of the wiring loom/ECU, etc??
Around 4 years since i converted a Transit 80 76ps di to tdi (intercooler) quite simple and no Ecu/wires. it run great the power was unbeleavable top speed 90 up or down hill all seemed well until it broke down with the injectors failing one upgraded no worrys cost me about £1000ish inall