1) will was made in 1984 . ie 30 years back . whether any witness to will are alive?
2) in order to prove the will you need to examine atleast one attesting witness .
3) the property appears to be ancestral property . you have not mentioned how in 1974 property was partitioned whether deed of family settlement was made / was it duly stamped and registered?
4)whether any legal notice was issued by your aunts ?
5) whether any suit for partition has been filed by your aunts ?
6)whether on your grand father demise property was mutated in your father name ? whether any relinquishment deed was executed by your aunts ?please clarify