Hey guys, messed around a bit last night installing a few 'depo' gauges, vacuum, oil and water temp. electrics are all sorted, as is vacuum - just had trouble finding a location for the oil & water temp sensors. I found two potential sensors on the coolant elbow, one had two wires coming out of and the other one. 
 
As for oil sensor i'm stumped.. Any help with this would be appreciated! I've got a gen 1 3sge by the way.
 
Cheers

Coolant tree is fine, or you could use an adapter in the hot pipe.  Oil temp can be put in the sump.  You might be able to find an oil plug with a thread in it to make things easy.