If you have a 200SX SER B14 that is automatic already, there is no problem to put a VVL motor in it. If you have a GA16DE in your B14, sell the car and get an automatic equiped B14 with a SR20DE motor in it 95-99.
180-185 WHP with automatic trans with mods below
SR20VE motor
N1 cams
JWT tuned ECU, use (200SX SER Auto 95-97) tuned for VE, 96 Maxima MAF, No Rev Limit
Maxima MAF 95-99
JWT Pop Filter to fit Maxima MAF
SSAC header with 2.5 in pipe to car
2.5 inch mandrel bent exhaust
G spec Pullies
Thats should make a fun ridewith automatic trans.