This is what I did:
Oil feed, I T'ed off the oil sending unit and ran it around the back side of the motor. 3AN and about 4ft of SS line
Oil return, drill and tap the block for a 3/8th or 1/2" NPT and use a 5/8th barbed fitting. As soon as you look at the block, you'll know right where to drill/tap.
Water lines, extend the water lines that typically run to your TB for your water feed/return. I ran one around the back and one around the front. You could also use the S14 water neck to shorten one line.
Of course I'm using the S13 SR20DE, so I can't give you any advice on the ECU/harness. I used the KA harness and a sentra JWT ECU.
