There's no need to pull the engine out. I've done the plenum on my 32R. Sure, its an absolute bitch of a job, but motor out is harder. If you find yourself getting frustrated, walk away for a while.
For the hoses, here's my list. IIRC i missed the fat 90 degree ones that go either side of the IAC.
Coolant pipes on Drivers side and rear of motor;
21307-05U02, 14055-05U11, 21307-05U04, 14055-05U01, 14055-05U02
Water/heater: 92410-05U00, 92402-05U00, 92401-05U00
Lower radiator hose: 21503-72L00
I had some photos... i'll see if i can find them, they may help a little.
Good luck
EDIT: they photos are here: http://www.skylinesaustralia.com/forums/gallery/album/15274/4185-plenum/