I don't know what year manual you have, but mine purchased just two years ago says NOT to pull studs unless they are damaged because every blown head gasket he WW has seen has been due to pulled studs. He says if it is damaged to Helicoil the holes to repair, and details a procedure for this, on Page 38. He definitely DOES NOT recommend removing studs if making a 2700 into a 3100 due to clearance issues.
Unless this has been edited since then, my manual #6528says NO! Colin Rainey brokerpi...@bellsouth.net