[Knifeblade]

Quich check for head warp is to get a straight piece of wood dowel and roll it over the head surface. Look under the dowel as you roll it, any daylight, warped. Chances are the warp is very minimal and hard to detect, an old-timer trick is to put some water-soluble paint on the head surface [make SURE it is water soluble house paint type stuff that washes off real easy as ya don't want it adhering to the surface or to any of the cylinder ports.]

roll the dowl slowly over the surface, see what the dowel picks up paint'wise, do it bit by bit, wiping the dowel off frequently, the paint lifted off the head surface shows the warp. Imeediately wash the paint off the head afterwards!!!!!!!!!!!!!!1