BTW, I brought my cams to offset lag and help the breathing etc, i figured that the easier it breathes, the lower the lag.
I've extrude honed my manifold, match ported my turbo and gasket, and [one day when I take it off the road again] want to flow the head and inlet manifold [although inlet manifolds flow OK std but like everything else can benefit from a clean up]. I only use my Skyline for road, I don't [can't afford, well I can afford, but there are competing priorities like 4wd's, m/c's, and housebuilding] race it, so probably won't change the inlet to a Greddy or somesuch.
And I always intended to go to a bigger turbo than std hiflow, so the cams were part of a future plan I had.