-You just use a tailshaft from a manual ca or sr s13, it's the right length for the rb20 manual gearbox.
-Slot the mounts if you want the engine to sit lower, especially if its going in a 180sx.
-Front swaybar needs to be spaced about 1cm down or use a whiteline swaybar that is extended forwards.
-The rear of the power steering pump needs to be modded if its going in a non-hicas s13.
-Use the rb20 radiator and twin thermos.
-Only a few wires need modifying, its the ones on the loom near the airbox.
-Use the rb20 air con lines.