As per him my father could not do this WILL as the property was not originally purchased by him. He got it from my grandfather as inherited ancestral property.In such case i have share in property even if it is not mentioned in my father's will.
Should i go ahead and file such a suit?
You have stated that your father distributed the property equally to our two brothers by making a will and it has come into force after his death. Accordingly your brothers have acquired the property and are in enjoyment of the same without any interruption.
Your father had marketable title hence he could bequeath the property to his sons as per his desire.
Though this property was acquired as his share out of the property that belonged to your grandfather, it ws given to him by partition or his share from his father's property, thus it becomes your father's own and absolute property, hence he had full rights to dispose it in the manner of his desire and to the persons of his choice. This legal authority cannot be questioned by anyone.
Moreover grandfather's property canot be termed as ancestral property.
Thus, your advocate has thoroughly misguided you with incorrect information and wrong position of law.
You may ignore his advise and discard the idea of filing a partition or any other suit because with the given facts, they are not maintainable and it would be a mere wast of time, energy and money.