gee joey now I will have to rebuild my engine just so I can buy this thing. Don't want to wipe the old engine out making in run good.
I'm just doing pre-turbo maintenance by throwing on new full head gasket kit with valve stems, head studs, all the oil gaskets, injector orings/insulator/grommets, fuel filter, fuel pickup screen and mod a blue fan clutch. If you haven't already, change out the water pump, tstat, all heater hoses + heater bypass, belts, etc if you're tearing into it.
leaving the bottom end alone, unless I tear it apart and the straight edge block test fails. It's a iron block. Those things are near bulletproof like the 2jz's.