Mushroombert... eyebrows? I know on the pistons the indentations are the eyebrows, but I didnt know that the cylinder walls themselves have eyebrows for valve clearance?.. I would have thought if that was true then all of the cylinders would have had them..? ..hmmm...
I've always called them eyebrows, and the ones in the top of the piston "valve notches." Here's a pic of them on my 350.
-=>Lee<=- Due to budget constraints the "light at the end of the tunnel" has been turned off!