It is a remake of 1981 Tamil movie Sattam Oru Iruttarai which starred Vijayakanth in lead role.
Apart from these, Ram Balram was the only other film that the two starred in together, if one does not count Dharmendra's guest appearances in Andha Kanoon and Naseeb, and Amitabh's cameo in Guddi and Dost.