Yesterday went to Tariq Road Ac market, shown the ac fittings to three different shops. They gave following diagnostics/recommendation.
1) Ac compressor is seems to be in working condition, was jammed due to non usage, instead of R12a, R134a will be refilled.
2) Ac Compressor currently fitted is for some 1300/1600 cc car, if made operational is going to put a lot of load on engine.
better to put some other compressor in it. Kabli Mitsubishi is recommended by at least two workshops. cost between 7500 to 10000.
3) One Workshop,(Mota Ac) recommended to replace whole system, Kabli Sanden setup cost 16200, Sanden China 20000, Thiland 25000+.
I am thinking about mitsubishi setup as budget is limited..