I need to get new rear shoes and cylinders.

I found these Bendix Catalogue

does anyone have the specs for the drums on the GS so I can work out if these will fit?

Thanks

edit. while I'm asking questions. I'm starting to have trouble doing hill starts (juddering when taking off). I'm trying to adjust the clutch pedal so it picks up a little lower off the floor so I can control it better but now I'm concerned it's not fully engaging. How much should the shaft on the clutch master cylinder move? I seem to recall it's a 22mm stroke but now that I'm looking for it, I can't find the information.

My thinking is that if I mark the shaft 22mm ( or whatever the measure may be) from the boot on master cylinder, get a helper to push the pedal to the floor and make sure the mark moves 22mm closer to the boot. I guess if it still shudders after that I need to start saving for a new clutch/flywheel etc........