While you are about it get the 2 pedal return springs. They always break. All 3 of my cars had at least one spring broken. The clutch & brake springs are different however minor. They curl around the common shaft.

 

Good tip Glyn, thanks

 

Peter
Unfortunately, I didn't get the pedal box and tail shaft from the donor car. The owner had bought the very rusty S type for the rear end and was dumping the rest. This car was in the country, but I had a friend who lived in the area check the engine and he reckoned it was good.
By the time I got there the engine and gearbox were out and the rest of the car had been picked up by a scrap metal dealer. I did however get the radiator which was in good shape. I paid A$500 for the engine and gearbox and the owner threw in the radiator for free. It turned out he had only paid A$500 for the car and was happy that he had got the rear end for free. A bit of a win-win for both of us.
Incidentally the MK1 I was reviving had factory original disc brakes which was pretty rare in Australia.
I endorse Glyn's advice on the pedal box springs. Having had about a dozen MK1/MK2s I have lost track on how many I have replaced.