i am not sure about the water temp gauge, but i can kind of help you with your oil.
i have the autometer Z-series electrical oil pressure gauge. i got this one because it matched my VDO boost gauge that i have mounted on my Pillar.
to wire its its pretty simple, two wires, a white one and a ground go for your little light in the gauge, so that can go as a matter of prefrence. then you have three more wires. one goes to an 'ignition' source down in the fuse box, another goes to a good ground (yes, for this gauge there are two grounds) and then a wire that goes to the oil pressure sending unit.
the oil pressure sending unit goes on the passenger side of the block right by the hose that comes out of the water pump. its towards the bottom, can be a real PITA to get it out. it mounts onto a T right next to the turbo feed line. it might be easier to diconnect that lower hose from the water pump to get to it though, dont really remember. i know the sending unit will not thread into the block, you have to use one of the many adapters they send you with the gauge.
there maybe another place to hook it up, i dont know, because you have to take out the factory sending unit which controls that precious idiot light. i just left my plug unplugged (for the light) and tucked it up some where, the light doesent come on, so i would never know the difference, now i dont know if you want to keep the idiot light working, because if you do then the way i described wont work...
i think i am done....