Hey ! Thanks so much everyone for the detailed replies.
These days the market is flooded with K engine at Shershah (the local market here). K24A ranges anywhere from 130 - 160 or so. Just recently i saw one being swapped in an 88 EF sedan. The guy got the engine for 130k (complete with MT). There was also a K20A sold for 110k (MT). These are just quotations which i have gotten from different people, i have yet to visit shershah myself and talk to a guy i know. But i have been hearing that there are lots of Ks available
K24 that was being swapped in the EF sedan was being charged 70k (including axels etc). Wiring , other mechanical stuff would be charged separately
When i was at the workshop last weekend . I saw at-least 3 cars with K24 swaps 
Given the current situation , i am assuming i have to shell out somewhere around 300-350k i guess. Of course going the turbo route would be much cheaper.