Hi
You can get the property and land of your grand father transferred in the name of your sister and you based on the following documents which are sufficient for getting the property mutated in your name.
a) Death certificate of your grand father.
b) Death certificate of your father and
c) Legal heir certificate of your father
You and your sister should approach the Sub- Register office and get the properties transferred in your name through a conveyance deed after payment of registration fees and stamp duties.
WILL may or may not be produced at the Sub-registrar office (you should take the call to produce the WILL at sub-registrar office, if the sub-registrar who has discretionary powers may or may not accept the WILL without Probate).
Another alternative is to get the WILL probated in court of law. This process might take about 4 months and after the WILL is probated, you need to go to Sub-registrar office with the court decree and get the property mutated in your names.
Registration fees and stamp duty in case of Mutation without probate of WILL will be
a) Stamp duty- 4% On the market value of the property
b) Registration fees - 1% on the market value of the property
Registration fees and stamp duty in case of Probate of Will will be
a) Court fees-5% of the market value of the property.
b) Stamp duty after probate of Will -1% on the market value of the property but not exceeding Rs.10000/- for each share
c) Registration fees after probate of Will- 1% subject to a maximum of Rs.2000/- for each share.
Hope this helps.