You can ignore this. I must have posted it here by mistake. It's not totally applicable in this thread.
Well, assuming that not a lot of money is to be spent and not a major conversion (though 4 disc brakes later would be good) I wonder if anyone has used a modern booster and master cylinder with otherwise stock Opel brakes.
Doesn't the Isuzu option linked to above also require changing wheels sizes too? I suppose that if they also have a more common bolt pattern that would be a good thing but right now I have aluminum slotted mags that fit with Opel brakes etc. and right now I just want to get my brakes working without major changes. But as I see it going to a modern booster system that's readly replaceable is a very good thing. Everybody will be facing this sooner or later.