pretty sure its just take out engine, gearbox, loom, fuel pump, clutch slave and master and then replace.
ive heard of people putting in sr20det's aswell, more common then you might think (but why bother right?).
best option if you can fork out the cash is use an s14 m3 engine (not s14 as in silvia), they are basically a race built engine.
all e30's are basically the same. if you put an engine and driveline from a 325 into a 318 its essentially a 325.
