Sorry to hijack this thread. I've been working on an alternative brake disc upgrade option that uses the drum hubs. I fabricated a bracket out of 10mm aluminium that bolts onto the 3 holes on the hub and this holds the caliper, I then used a Nissan Stanza front vented disc as this doesn't need to much modifying to fit over the hub (I had to elongate the stud holes using a file) and I had to grind the back flat as I didn't get the discs that were machined properly!!.
I then needed to source some rear brake calipers that fit vented discs, I went for some Siera ones but Mondeo would also have worked.
I then had to get the short brake hoses re-made to have the 3/8ths UNF female bulkhead fitting at one end and a M10 male fitting at the other.
I used the standard Siera handbrake cable, cut (as it was too long) and a balance bar made from a piece of angle.
I will be posing some pictures on the Projects page when I get round to it but this option is a possible upgrade for those who already have the drum brakes and want to have discs without changing the hubs.
Simon