I can see two possibilities.
One is to have people like B. R. Shenoy take control of economic policy after the first decades of independence. As he was more of a maverick figure and one of only a few critics of the state-planned economy under Nehru, perhaps Rajagopalachari would be a better fit. He was an important figure in the independence movement, but unlike the other dominating figures in the Congress Party, he had economically liberal views. One could also make his own Swatantra Party a stronger force in the mid-1960s, possibly after a more decisive defeat in the Sino-Indian War.
There is another possibility, but that would kick off economic reforms probably in about the early 1980s. Sanjay Gandhi takes control during Emergency, either through 'indirect' rule as his mothers' main adviser, or after an assassination attempt on Indira's life. As Sanjay made it pretty clear that he's not the best friend of democratic decision-making, it would be very likely that he won't let elections being run if he's in charge of the country. Therefore, he rules India with his own coterie (Kamal Nath, Jagdish Tytler, Ambika Soni, Rukhsana Sultana et al), supported by loyal Youth Congress cadres and a selection of technocrats. After Deng Xiaoping makes reforms in China, Sanjay decides to "go the Chinese way" and imposes deregulation and privatisation policies, helped by the appointment of V. P. Singh and younger technocrats who favour the electronics and telecommunication sectors.