Ownership rights on grandfather property who died without will

My grandfather (mother's father) had 8 children (4 sons and 4 daughters) and he died in 1955 intestate. He had built a residential house in 1940s out of his own investment and it is still in his name. Only 2 sons and 1 daughter are alive today while others have passed away including my grandmother. My queries are as follows: 1) Do alive daughter and children of deceased daughters have a right on the property? If yes, what is the share? 2) Does the fact that my grandfather died in 1955 before the Hindu Succession Act 1956 has any bearing on ownership rights of the daughters (or their children)? 3) Does SC ruling on 2005 Amendment act has any impact on this case? 4) In case of eligibility of share of daughters, what is the process of registering the ownership?