Another good idea for when you are doing a rebuild is to have the rear Hicas removed, rather then having it locked off completely, unless you are happy with the GTRs rear end play. Keep in mind for the GTR it is pricey to have the engine removed, so it is better to get everything done at once that can be done. OH! and a absolute must is to have upper oil galley restrictors put in, that alone will solve the bottom end being starved for oil (if you do a fair amount of drifting, a oil pan baffle would be a good ides aswell), aswell as a after market crank collar (Tomei?) for the sump.