Basically, Mk2 and early Mk3 wheel wells have the spare wheel stored facing upwards with the tools underneath. Not very handy if you want quick access to them, plus the fact that the earlier jacks are shocking, with a very small footprint making them highly unstable!!
Later Mk3's by comparison have the spare stored facing down with all the tools inside in a handy casing. The jack is also far superior!!
Here's a reminder of what the early arrangement looks like...
Note the hole in the middle. This will come in handy later on.
Now the first step is to remove the old bracket. This is done by drilling out the spot welds...
Try not to go right through if you can, but it's hard not to with a conventional drill bit...
What you will need next (from left to right) is a long M8 bolt, 2 large M8 washers, an M8 nut, the original cup fitting and the original M8 wingnut...
Stick the bolt through the hole with a washer either side. Then put the nut on and tighten up to a sensible torque.
Here I have also cleaned and painted the area to protect the exposed metal from rust...
Chuck the spare wheel into the newly converted wheel well and apply the cup fitting and wingnut...
Get hold of a late-spec toolset and sit this into the spare wheel...
Job's a good'un!!