Mate of mine built a 25/30 eng with a T78. CP pistons, argo rods, stock crank, clevite 77 bearings, total seal rings.
Built around year 2000.
Due to metallurgy of jap engines, compared to yank engs, you should run closer tolerances on the jap eng.
My mate used 001'-0015' tops and had no dramas.
It was quiet on startup, bugger all blowby and better boost response.
Don't run a big clearance as you don't need to with modern forgies these days, otherwise you get an eng that wears piston/rings/bore quicker and more blowby.
Stock nissan rings seem to be the go as well as they suit the block and bed in better, self explanitory(metallurgy again).
Hope that helps you make your decision.