Ferrari rules!
Ferrari had the best driver line up in terms of speed for 1982. They also had a good car, that won the constructors championship even with both their drives being taken out by accidents.
Without those accidents either Villeneuve or Pironni would have won the title in 1982. Given the amount of hate btw the two after Imola one of them would leave the team in 83. My money would be on Villeneuve winning the title and staying. Given what the team did with Tambay and Arnoux in 83 and 84,and given that Villeneuve was faster than both I would bet on three consecutive titles for the canadian. I also think that after the 82 mess, the team would go for a "number one" team strategy and get a good number two pilot to back up Villeneuve, not pressure him. Tambay would be a good choice.
Ferrari in 83/84 would be a lot like in the Schumacher years, the best car, the fastest driver, lots of wins.
Then in 1984 the cold eficiency of the McLaren/Porsche/Lauda/Prost machine would prevail, but Villeneuve would give a lot more fight than Alboretto did.