Okay so for everyone wondering this is what I’ve found out.
r32, r33 and r34 rear brakes are all the same bolt size so are all interchangeable between model, turbo and non turbo.
r33 gtst fronts are NOT direct bolt onto r34 gt or gtt. (They can be fit however will require tapping new threads)
r34 gt, gtv and gtt all use a m14 bolts for the front calipers where as r33gtst use m12 bolts for the front calipers.
on the r33 gtst front calipers there is a thread inserted into the caliper to downsize the thread size to fit the m12 bolts. This can be removed as it’s crimped on. Once this is removed you will need to tap a m14 thread into the caliper holes.
r34 gtt calipers are direct bolt onto all r34 models (meaning no drilling or tapping to make them fit)
you will need to cut the dust shields to fit r33 gtst and r34 gtt brakes onto a r34 gt.
hope this helps anyone who was given 30 different answers like myself.
Also don’t need anymore condescending comments that didn’t answer my question. I asked if they were direct bolt on. (Meaning they bolt straight onto the car) I didn’t ask what work had to be done to make them fit.