Vic, thanks for bringing up very interesting post and the information from that is very informative!. I believe as a guide if you measure the small square shaped tabs on edge of head below spark plug holes, that originally should measure 1" or .1000 ", any less is amount removed. best regards bill.

  AussieBill            YYYY    Forever Y Block     YYYY

 Down Under, Australia

Bill thanks for the info, it looks like only .010 inch has been removed so that is a good thing.

  Vic Correnti