Ahh, with it being a 92 you might struggle to get 93> shoes in there. It would be a bit obvious. Yes you could get bigger discs on, but unless you actually put the caliper back on to drive it, you wouldn't come across that problem Andy. Take a shoe off and put it in the drum and see that it fits.
Mark, I just wish you were closer, I'd have a look at it for you and have you on your way.