Yep. To confirm try the brake pedal first thing in the morning before starting the engine. Hit it a few times to make sure there is no vacuum left, pause, and then push down on the pedal and see how it feels.
Yep a lot of people have installed the 4.1 CW&P into the R34 GTR:
R.I.P.S NZ
I've had a stock R34 GTR drive in and we've put a complete R33 GTR front diff into it no problems at all. Just make sure you swap the rear one too, lol.
Which are basically copies of the AP brakes. I just went to Race Brakes and they matched them up (the stockers hardly lasted one track day). I got Pagid pads but there are probably some cheaper alternatives.
Despite Brexit sooner or later England will join the rest of the world in adopting international units of measure such as grams and metres so think of yourself as a trail - blazer!
Its quite simple really - if they are in good cond they work. New tech ones work better. PM Scotty and see if he can supply new ones for your sidefeed rail.
http://scottyscustoms.com.au/
It looks like you are emptying your sump hence the fall off in pressure. Read the oil control thread for possible explanations and remedies. If you don't want to read the whole thread read the first few pages and the last half to see how thinking on this matter has developed over time.
You will find in the 7 years since the last post there has been lots of discussion on fuel coolers and ways of regulating the current to the pump(s) according to load.
I upgraded to 550 Deatschwerkls which i believe are actually highflowed stockers and they work ok but I think you may be able to get the better new tech injectors to fit in the sidefeed set-up (not 100% on this) but check with Scotty.