1. fuel pump: get the regular Walbro 255lph. If you want the high pressure, high volume 255 lph pump, then you will also need a NISMO adjustable fuel pressure regulator and fuel pressure gauge to turn down the fuel pressure. The high pressure pump will increase rail pressure from 43 psi stock to about 50 psi, thus causing your car to run rich and lose power.
2. flywheel: if you can afford it, then get one now to save on future labor costs/time, etc...average FWD aftermarket flywheel weight will be around 10-11 lbs. There are many companies who make one, Fidanza, JUN, Unorthodox Racing, Clutchmasters. Order the clutch and flywheel for a 1991-1999 Sentra/200SX SE-R.
3. Gaskets to replace: front main seal, rear main seal, valve cover gasket (order this for a 1997 200SX SE-R with tube seals), if removing turbo..get stainless steel exhaust manifold gasket for a 2001 Sentra SE, distributor o-ring
4. downpipe:
http://www.vrsexhaust.com sells 2.5" and 3" downpipes at very good prices. B13 and B14 downpipes are the same.
5. intercooler and piping: get rid of the top mount ASAP. If you want a VERY high quality intercooler and custom piping, PM me and I can fab it for you. It will quite expensive this way, though. Another alternative is the Hotshot kit sold by
http://www.jgycustoms.com
6. Energy Suspension motor mount inserts, Prothane mounts, or Place Racing mounts: make sure to get all four mounts.
7. You will also need the Energy Suspension control arm bushings to eliminate tranny breaking wheel hop
8. ECU: use the B14 harness with a JWT ECU and the B14 MAF. The harness will need to modded slightly to fit on the older style highport intake manifold. You will also need to solder in a 100K ohm resistor to replace the EGR temp sensor to avoid a CEL.
Getting the Bluebird ECU to work with the Bluebird harness on the US B14 chassis is a PITA. It's about the same as installing an S13 harness and engine into an S14 chassis....possible, but a lot of work and you will still have a speed limiter.
9. You don't need the igniter chip on a FWD like in a RWD setup. The B14 distributor already has the igniter chip built into it.
10. The AWD tranny hits the steering rack. Use the FWD tranny. Two of the tranny bolts will not line up, though.
11. You will need to trim the oil pan a bit to clear the crossmember.
12. If you need help converting the B14 harness onto your motor (for use with the JWT ECU), PM me and I can do it for you.
Good luck man,