How much are you willing to mod the car ?
If its an engine swap you are after, this Civic is a pretty good option. Its lighter than the newer models ...
Engine swap main you will have to get the mounts changed for any B series swap. D16Z series SOHC VTEC will bolt on right in. And If I remember correctly ... thats the normal 1.6 VTi engine.
That engine is easier to mantain than a B series, mechanics know it easily and CNG kits bhe araam sey lagwa chukay hain log.
So 90 Civic + D16 is a good bet for you!