Hi Bob, my head is cracked between all the valve ports but one, same way on injector ports. When I purchased the tractor it ran fine, but it pushed water out of overflow.  We determined head gasket blown, had head surfaced, shop showed me cracks,  to bad to repair so 3 shops said.  We installed head anyway, tractor ran with a skip, tested injectors, water poured out from #1 hole, installed block seal to try and correct this.  Motor started knocking afterwards, bad knock.  Pulled behind shop &amp; quit. My Oliver mech. said bolt pattern on new style head was different, plus intake is different, any help is appreciated, tractor to good to junk, plus to many $ in already.