What my lawyer says is that my grandfather died after 1956, around 1956 an act was passed which says that my father is the actual owner. He also says that most of the people don't know about the concept of ancestral property in India- in a way, there is nothing as the ancestral property. He says that my father can transfer rest of the ancestral property in his name according to his will without any problem. Please clarify this point.
I also want to know about the articles to be used in my case
Your advocate is absolute right in his opinion about the nature of ancestral property.
The property that belonged to your grandfather has been inherited by your father as his legal heir, hence your father becomes the absolute owner of the property and he can exercise his rights in the property to transfer the same to anyone of his choice and his authority to do this cannot be questioned by any law since the position of law says that he is the absolute owner of the property.
It appears that you are heading to a losing legal battle, hence it would be a right time to take a proper and wise decision at this time also, in this regard.