Nothing magic about the singh grooves and they won't " put the compression in the wrong direction". All the groove do is direct the A/F mixuter being compressed in the squish band into to the combustion chamber. The main purpose is to force all the A/F mixture out of the squish band and into the combustion chamber for a more efficient and complete burn. Detonation occurs when the A/F misture is fragmented and doesn't burn at the same time; the more open the squish band is, the more the A/F mixture can disperse and fragments can escape the initial burn; ping city when that happens. That is the reason for a .030" head gasket; to tighten up the squish band and move the A/F mixture into the combustion chamber; the grooves just facilitate that action.

Check the photos. As you can see there is nothing magic about the location. Hell, you could file/dremel a couple of grooves yourself.

 

Don't leave any sharp edges or pointy points.
Smooth and rounded edges.