Sadly yes. I mean app paisa lagao gey 15 sey 18000 aur phir maza nahi aye ga tu faida.
Waisa if u still wana try it tu phir what u can do is do a bit of alteration
1 - Install Denso compressor that puts less load on engine.
2 - If u can try to install condensor of Cultus Multi aisle one the one that came in the new model that is available and agar Alto ka mila tu best its small so it will fit well.
3- There should be a fan infront of condensor as well means double fan hoga one or radiator and one on condensor alteration karni para ge but u have to find a slim fan for it.
4 - Radiator will be a prob so get coure's original japanese radiator us ko alteration karwa kar fit karwa lo. best yeh hoga to find Japanese Qabli charade Diesel 3 Nali radiator it will be hard to find lekin mil gaya tu gari heat up nahi hogi chaha jo marzi ho 
Do the above and a/c ka faida ho sakta hai 
A/C ka leya kum sey kum 1000cc ho plus us main bhi setup acha kia hova than koi faida hoga waisa a/c is good in 1300cc or above cars us ka necha buss room cooler type ke cheez he banti hai i am talkking about old cars here ok 