over paper please write down which engine & transmission type you are looking for such conversion. visit the scrapyards in your area and collect information for the pricing.
or if you want that as turnkey car goes in and 3 weeks later it is delivered to you with changes. stash away approx 600000 +/- 10% . cost of excise endorsement to regn papers will be extra.
look at profile & posts of @hassan1991 he is gentleman member from Lahore can be of your help against consulting fees. Time is money you will agree.