a petrol engine with ecu , wiring & transmission will cost over PKRs. 100,000 with no history at all. add nitty gritty plus the labor it will cross 135000 figure.
Nobdy knows for how long that engine is rotting in yard from which variant of vehicle it has been taken off. PLUS the registartion book need endorsement.
over haul with maximum oem parts.. will cost much less, and the vehicle remain in its stock configuration.
do the maths and calculate the risk of buying an engine of unknown history & origin