side water branch stud extraction

[Martin Prior]

I've just done this. I filed the stumps of the studs flush to the block to give a good, flat surface, drilled and re-tapped them and fitted stainless steel studs.

Mark your drill bits for depth - there's not a lot to play with and I have heard of people drilling straight into the cylinder.

Edit: Just realised that I've repeated much of what Robert said above. Sorry!