After a long discussion today afternoon, I have conveyed my rejection for the above engine to my uncle. He tried to reason out with my dad today but even dad wasn't comfortable using an engine of a car whose history was complicated. In my last message to my uncle half-hour back, I have quoted him that after receiving feedback, "I am shutting the case of engine replacement and won't be interested in this. I don't want to ruin the leftover life of my car"
. So, me and my dad would be looking towards buying genuine spares from MSIL and get the same replaced. Though spares may take time to reach ASC but we are sure that we'll be going for the original spares only.
It was indeed a heart-warming feedback from all of you. Though I was in Mumbai for last 2 days but read the views and I am truly thankful to you all for giving clear and unbiased views.