A wire brush is not the tool to use on cylinder walls, the cylinder head sealing surfaces or the block sealing surface. I used a whiz wheel, which is an air tool much like a die grinder except its angled and the wheel is made of 3M Scotch material which is made for aluminum. A wire wheel would take off too much metal and a wire brush will just ruin the sealing surface.
You're not sending the head out to have it tested for cracks or warpage?
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