The State of Vietnam (no north-south split), the Kingdom of Cambodia, and the Kingdom of Laos all survive as ROC allies. Thailand and the Burmese military junta are also ROC allies. Along with military-ruled Indonesia and the Philippines, Singapore and the Republic of Korea (which would most likely win the Korean War and reunify the peninsula) will have good relations with the ROC. Finally, relations between Japan and Malaysia and the ROC are likely to be lukewarm, but still cordial due to their shared anti-communism and pro-Western stance.
India becomes even more pro-Soviet as a result of being encircled by pro-ROC states across Southeast Asia, and a pro-ROC Pakistan to its west. This could be enough to push India into going full-blown Red.
With East Asia and Southeast Asia effectively blocked off to them by the anti-communist bulwark of the ROC, the Soviets will feel more encircled and seek to meddle more in the Middle East, Africa and Latin America, provide more support to India, and exert even stronger control over Eastern Europe and Manchuria. But without the Sino-Soviet split, the Soviets feel a lot more ideologically secure as well, as there is no other communist nation (not even potentially India, and certainly not Manchuria) that could challenge their leadership of the communist world.
The Red Scare is lessened in the United States. Nobody really "lost China" here. Although the Domino Effect could pop up elsewhere like the Middle East, Latin America or Africa, and NATO would still be paranoid about the Iron Curtain.