What are you hoping to achieve by changing the carburettors, is it performance gains or is it for reliability?
I always found that the HIF setup always delivered both performance and relaibility but had to be set up correctly in the first place (e.g. vacuum, linkages, etc)
Perhaps this will help George---
Starter Motor 2.0L Diesel
1)Disconnect the battery.
2)Remove the air deflector.
3)Disconnect the vacuum pipes from the vacuum solenoid valves and the vacuum reservoir.
4)Disconnect the vacuum solenoid valves electrical connectors.
5)Detach the wiring harness from the vacuum solenoids and vacuum reservoir mount bracket.
6)Remove the vacuum solenoids and vacuum reservoir mount bracket assembly.
7)Detach the wiring harness retaining clips from the wiring harness support bracket.
8)Remove the wiring harness support bracket.
9)Detach the starter motor.
10)Position the starter motor to provide access to the starter motor cables.
11)Remove the starter motor solenoid cover and electrical connector retaining nut.
12)Remove the starter motor by removing the starter motor electrical connector retaining nut.
Install is the reverse of above