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Message: <blockquote data-quote="reivaxtorres" data-source="post: 449096" data-attributes="member: 8890">PI motor swap is pretty much a direct swap. take one out, put another one in. the harness is the same, but you would need to reuse the NPI fuel rails. to make things easier, i would re-use all the NPI accessories (A/C, power steering, alternator, etc). all these things should be interchangeable between the years, but just to be on the safe side, i would just keep the NPI stuff. i know for a fact that these all mount the same way and in the same locations, the only difference may be the plugs. i know for sure the alternator plugs are different starting in 01. as for the auto to 5 speed swap, the mechanical part of it is easy. all you have to do is remove the auto trans, replace the flex plate with a flywheel/clutch combo, install the 5 speed using a 5speed mount and 5speed cross member, replace the driveshaft yoke from the auto one with a manual one, and you are pretty much done under the car. under the dash, you would need to replace the single pedal assembly (brake only) with the 5 speed pedal assembly (clutch pedal and brake pledal), route the clutch cable into the cabin and install it all. the rest of it is electrical. you would need to wire it up so the speedo works, the reverse lights work, and if you wanted to, so that the car wont turn on without depressing the clutch. i would say the engine swap is a good 3 out of 10 difficulty because of any parts you would need to reuse, the trans i would say is a good 8 out of 10 because of the wiring. thats compared to the 240sx engine you pulled.</blockquote>