I am myself a proud owner of mehran and I am really pleased by the effort you have put in to upgrade it. But honestly speaking the dipper's of Mehran are quite good and provide excellent visibility. I really don't see the need to replace them.
Mehran's suspension is all right. In fact, a bit better than Alto. You shouldn't have altered it. Raising the car and adding larger tires with heavy RIMS is the reason for poor economy of your car and would make your car unstable at high speeds.
Things you need to make your car perfectly safe are these.
1 - Seat belts which new models have.
2 - Good brakes. Mehran comes with shitty brakes and this is by far the first thing to get modified in this car. I believe you have already done that.
3 - Remove HID's. It only poses a threat for you and other's for the possibility of head on collision.
4 - Have an emergency took kit with you. You should carry a small tool kit, small rope, torch, few rags, and a bottle of water in your car.
5 - Please remove the Monster Logo. It is only destroying the stock genuine charismatic look of the car.
6 - Shiny RIMS ?? Design wise they are amazing but I guess the colour and silvery shine is just of not my taste..
7 - Mehran is one of the most economical cars, and now with EFI have replaced Alto as it's production has been discontinued. For added comfort, it would have been wise to install a good Air Condition in your car and keep it properly modulated to prevent over heating.
I congratulate you on your purchase and amazing modifications that you have done to suit your taste. Drive safe brother.