most kabuli are 1.5 G15, having distributor and slightly different from 1.6 g16b.
shopkeeper will sell it to u as g16 boasting that it has got a disti.
do check the engine block before confirming, and get a complete uncut wiring and matching ECU.
better if u find a front cut and swap is completely, including cluster, front brakes etc.
g16 will give u max 10 within city, however 15+ on highway, its a screamer, g13bb is a bit smoother due to waste spark system and better in fuel economy.
g16 works really well with CNG and AC is also a bit better