The head looks fine. I've had the machine shop give it to me a with a lot coarser grind pattern and I didn't have any problems. On the block the part that is really critical is the piston sleeves. The outside walls are less of a problem, since they are just the water jacket and they consequently only get maybe 15 psi, where the sleeves get more like 120, before the ignition.
I think the block will probably be fine, but I would take a steel ruler, I typically use the edge of a steel square, to check the block to make sure it did not warp. If your not entirely comfortable with the block, you can take a piece of 180 grit sandpaper on a block of 2*4 about 8 inches long, to just finish cleaning up the gasket adhesive that has not come off. If the block is flat, I usually just use a wire brush on the end of drill to dig the old gunk off. Alternatively you can just use a piece of coarse steel wool, or even a kitchen scrung scrubber thing, although it will probably die in the process. It will give you a little less old gasket adhesive on the surface, before you gunk up the new headgasket and start putting it back together.