I fitted R34 GTT turbo brakes front and rear including the r34 booster and master
Fronts-
Calipers and disks bolted striaght on, no mods 310mm disk on r34 (r33 are 297mm)
Used the stagea front brake lines and banjo bolt. Need to shorten banjo bolt approx 2-3mm, done in lathe, or you could mod the caliper by removing the metal seat so the banjo bott will not bottom out
Rear-
same size as R33, caliper and disk bolt straight up.
Used the r34 brake line both the metal line and the rubber hose, bolted straight up to body.
I also fitted the R34 booster and master as I bought everything as a package. Not sure if it made a difference, but they have a different part number, so maybe it suits better. ( note brembo fitted GTR's ie vspec 32's have a different booster to the non brembo cars)
Red caliper is a r34, which shows the metal seat, black caliper is a series 1 stagea
Note my car is series 2.
Wheels clearance, I have R34 gtr wheels, so no problems