I have a late Torana front and am using HQ style stub axles with HQ cast iron callipers and redrilled P76 discs.
It's funny but I have talked to a couple of different brake experts and they have said the HQ Holden brake set up is hard to beat as a standard set up




Both the callipers and rear wheel cylinders are one of the biggest in regards to volume and they have a very big booster as well.
Because of the room restriction near the bonnet hinge I have settled for a Gemini booster and &*#@ XB master, we shall see how it goes or stops I mean. Anyway if the combo is not up to scratch I'll just muck around until it suits both the engineer and my driving style



Regards Greg