[Harry Moon]

Well i bought one of those Argentine master cylinders and put it on my C60L during restoration. Bled the brakes and everything worked fine or so I thought. Once the rest was put together and had the power booster on and actually used them, after a couple of brake applications the brakes went mushy. So bleed each wheel, remove drums to make sure no leaks etc. Damned if it wasnt the master cylinder. worst machining I've ever seen in a new part and dangerous the day it was put in a box.
The casting had a tapped and threaded hole near the base, it actually entered into the side wall of the cylinder. as you activated the brake the seal passed over this hole and cut off moon shaped slices off of the seal resulting in total loss of brake pressure. upon further inspection nothing was right about the machining, off centre. If you can't get the original resleeved try a later side mount with a fabricated bracket.