Hi Marty01!
Hello Marty, it's Greg! Man after reading your post, I have to answer like this. If you are planning a ca18de or ca18det swap, you will need these items fron front to back I will list. . .
#1 ca18 radiator because the 1.6 is not up to the cooling of a 1.8.
#2 the motor ca18det or ca18de.
#3 usdm ca18de FWD transmission.
#4 usdm ca18de FWD axles.
#5 usdm FWD ca18de hydrualic clutch assembly parts/pieces.
#6 usdm ca18de Pulsar motor & transmission mounts.
#7 jdm FWD ca18det engine harness or usdm engine harness to modify.
#8 fuel injected fuel tank (all are same) if your car is carbureted?
#9 fuel injected ca18 fuel pump NOT 1.6 pump the 1.8 pump.
#10 FWD ca18de ecu if you swap does not come with it?
You man want to check to make sure your engine comes with all power steering pumps, A/C compressor, starter, alternator, and all pulleys. I have noted some places selling ca18det's for like $500.00 and they are all stripped of all accessory items like these BUT the turbo.
While the motor is out of the car, it is an ideal time to install a front sway bar on your B12 Sentra if you have the model that DID NOT come with a stock installed front sway bar.
Keep in mind the accessory items named above can be purchasec from a usdm FWD ca18de and used on your ca18det like the A/C compressor and all that. They are the same motor, just one is boosted. usdm ca18de 135bhp 2-wheel drive, ca18det 175bhp 4-wheel drive and the jdm 4-wheel drive transmission WILL NOT WORK on the 2-wheel drive cars you have to get the usdm tranny or do the complete 4-wheel drive swap!
I hope this helps you Brother, and it's all correct. The b11, b12, n12, & kn13 are all one in the same. -Gregory