|
As to sandpapering the head it really depends what you see when you get it off. Personally, I would only use sandpaper (wet and dry paper) to remove any minor scratches, marks left if there is any residual gasket goo, etc.
Even then I would put the sandpaper (wet and dry paper c 600 grit) on a sheet of glass or a known very flat surface and rub the head in a figure of 8 pattern with even pressure from above across the whole gasket face so that you limit the possibility of "crowning" the gasket face.
The head would then need to be thoroughly washed wiped /down to stop any residual abrasive from being introduced into the cylinder bore.
I think probably a 1200 head is too big for this process as the footprint would be almost as big as the wet and dry A4 sheets.
If that is the case you have 2 options put it back together with new Viton seals, before doing so you could try a steel ruler across all the bolt holes with a torch behind it to see if it is flat or warped.
The other option is to take it to a machine shop for a very light skim which you will have to do if it is warped.
|