Firstly this is a how to dealing with welding a centre diff BUT allowing the retaining of the front axles so to make it easier to pass a WOF without to many questions.
Now for the warnings I take no responsibility about any damage done to the vehicle or person whom under takes this mod .
You will need to take the centre diff out of the gearbox, this can be done with gearbox in car
This is the centre diff as it should look (this one is from a 93ish GT so yours may look different)
Disma