Dear Brother,
Thanks for your encouraging remarks. Although Mehran is not upto the level of its JDM counterparts but it is still good for daily use within city. My response to your query is given below:
1- You shouldn't expect great chilling performance from Mehran's AC due to lack of engine power which is just enough to push the car and not for extra burden. However the common problems like engine overheating and sweating even in AC have been resolved after my upgradations. As for the cost thing, I frankly don't remember it now but fan of vits is easily available from old parts market and must not be expensive (may be around Rs. 1000 ).
2- Break performance is wonderful after the upgrade. All it needs is a slight foot indication and it halts. Now this is an expensive thing to do but you may opt for the servo only and do not go for 4W disk brakes. Again, I don't remember how much I spent. A safe guess is around Rs. 2000 for the servo thing. I don't know how much all the stuff cost these days.
I just remember the overall figure that I spent about a hundred and fifty thousand on my stock Mehran to convert it according to my preferences and it still lacks some features such as power windows, defogger, etc. The price of Mehran has been raised too much and people now prefer other recondition cars such as vitz, mira, move, etc. However the satisfaction of having a unique car is a different thing.
Regards,