The Secret Rivals
Two rivals, Sheng from the South and Shao from the North, have one common enemy, the Silver Fox. The Silver Fox killed Shao's parents and robbed from Sheng's palace. When each one fails to defeat Silver Fox, the two decide to team up and win.
Starring John Liu Chung-Liang, Don Wong Tao, Yeo Su-Jin, James Nam Gung-Fan, Hwang Jang-Lee, Lee Ye-Min, Nam Chung-Yat, Chuan Hsiao-Chen, Kim Kwang-il, Yuen Biao
Watch "The Secret Rivals" on Amazon released in 1976. It's a drama and action & adventure movie, and has a rating of 6.4 out of 10 from Imdb which is usually fine for this kind of movie, and is currently only available for purchase or rent.