before going, check brake pads and belts otherwise you are good to go.
Just came back from trip till chillas via naran kaghan babusar top way and the roads are perfect. There are couple of landslides but you can manage that, we went on 660cc japenese mira, so you will be good as well.
Shogran road from kiwai was bad but people were bringing their sports cars up as well which i was amazed as they had very very low clearence (though i wenttop on jeep).
P.S if you have body kit installed in your car then dont take too many passengers otherwise front will get damaged
