Nutan was to play the special appearance role opposite Sanjeev Kumar in this film. But a few years earlier, she publicly slapped him on a film set and vowed never to work with him again, so her sister Tanuja, finally did the role.
Although the heroines Jaya Pradha and Rati Agnihotri didn't have much scope in the film, they looked very beautiful in all their scenes and they got the chance to work with Legend Nasir Hussain. Both of them were seen together in Mera Faisla, Main Awaara Hoon & Paapi Pet Ka Sawaal Hai.
The last Jaya Pradha's song in the movie, aise na thukrao aye sanam..was an additional song, it was recorded and picturised later adead to the movie later as the entire shooting of the movie was complete
This project took about 6-7 years to get completed. First it was launched with Dilip Kumar then it wa temporarily shelved. Then it was revived later after about 3 years Mushir and Riaz took over the production and wanted Dilip Kumar to play the central role but filmaker Nassir Hussein said that now he has Sanjeev Kumar in his mind and Zabardast was made at last. After about 30 years Nasir Hussein directed an outside production, the last outside production he made was Tumsa Nahin Dekha & Dil Deke Dheko.