Loosen / tighten individual cylinder head nuts?

[DRG-ler]

Hi Guys,

I would like to install some copper water pipes for heating in my 1930s Tudor. These should be placed long on the left of the cylinder head. But since there is no good fastening option there, I would like to build brackets that are fastened with the cylinder head nuts.

How are your experiences with loosening and tightening the nuts regarding the tightness of the head gasket? My head gasket is already sweating a bit on the left. A mix of petrol and coal comes out above the engine number. But not so much that I want to replace the cylinder head gasket. A drop every 100km.

Now I have concerns that the conversion will make it worse.
What is the experience like when retrofitting the heat protection for the ignition distributor? This is also assembled this way.

What are your experiences with the material pairings cast iron / stainless steel in relation to corrosion?

Thank you in advance.

Andy