dude, now your best option would be to upgrade it. Get an electronic distributor for your mehran, it would cost you about 3000 to 4000. Ask your electrician about this, he will give you a better and tell you from where to get it.
1 - no mechanical breaker point (electronic breaker point and doesn't need to be changed)
2 - improved fuel economy and performance
1 - You'll have to buy a whole distributor if the electronic breaker goes bust. but they don't go away that easily. Just make sure that your distributor cap is seal and sit properly on the distributor.
Let other members chime in and comment, then decide.