[JayJay]

Since you have the head off, this would be a good time to get a good straightedge and check the head and block for flatness. I use 0.002" as my standard. Check it with the straightedge going both long and cross dimensions, both head and block should be flat everywhere. Most likely item to get a variance is the head, if it's not flat then get it decked at a machine shop. You can't deck the block without completely disassembling the engine, out of the car. (Checking the head on the block without a gasket is a good first step but will only tell you the perimeter of the head, and won't evaluate the area between the cylinders).

BTW, like others have said, those valve tops don't look out of line to me for a used engine. Look and feel closely at the edges of the valves to see if you see/feel any pitting, cracking or burning. You can put a small mirror underneath the valve with it fully open to see if you see any burn spots.

Many folks here recommend the Best 509G graphite head gasket (available from the usual Model A parts vendors) with copper spray (available at your local NAPA auto parts store).