How many movies have Kovai Chezhian and M. S. Viswanathan collaborated on?

They have worked on 3 movies together! Their first movie together was Ooty Varai Uravu (1967) while their highest rated movie together was Uzhaikkum Karangal (1976). They have not worked together since Uzhaikkum Karangal (1976). They are most known for their drama films together.