I wasn't aware that the rears had changed when the bigger discs were introduced on the front.
Not that it concerns me because my 1995 80 has drum brakes (only) on the rear (and they work rather well, may I add).
What confuses me is Stumog's comment (above) that "if you want to do the rears from my understanding you keep your calipers but you need the backing plate that they mount to, the discs need changing and the gubbins inside need to be changed for the newer parts".
I may be off track here, but I'd always presumed that the calipers bolted onto the flange that's part of the axle casing. Having drum brakes, I wouldn't know, but researching photos on the interweb, I've seen nothing that contradicts this. Yes, the stone guards bolt onto the same flange, but the flange does not look removable, it appears to be part of the axle casing (sorry if I'm repeating myself).
I have considered upgrading my rear drums to discs, but not at the expense of changing the axle casing, can anyone confirm if Stu is correct please?
stu