The SR20DET first made it's debut in 1991 to replace the CA18DET in the S-13 chasis.
Improvements over CA:
1998cc
370cc injectors
Aluminum block
Intercooler
Piston Oil Squirters
B13 Chasis as stated above is called the Pulsar/Sunny in Jap. It also contained the SR20DET with a t-25 turbo. The GTIR model came with a t-28 turbo, ITB (Indiv Throttle Bodies), 444cc injectors. The GTIR was AWD.
The 200sx name was never stopped after the s12. It continued in Australia and Europe. To be the name of the S13, S14, and S15 chasis'. Unfortunately, the got de-tuned versions of the SR20DET in the S14 and S15 chasis which only made 200hp, while in Japan made 220hp and 203lb ft. The S15 made 250hp and 227lb ft.
End of story, and hopefully end of discussion.
As stated earlier, any swap can be done with the right amount of money and the right amount of skill.