Basically what the title says. If the Suez Crisis was averted, how long would Anthony Eden be PM? Would he still be in Number 10 for the 1959 (or 1960) election, and if so, how well would the Conservatives do against Hugh Gaitskell's Labour relative to OTL? Would his drug problem become an issue?
He wins in 1959. I am guessing that the victory would be similar to OTL.
In 1959 Macmillan faced an initial uphill struggle against a a slick (by 1950's standards) Labour campaign and the memory of Suez.
Macmillan pulled it out of the bag by trying to look like a reassuring father figure, talking about rising living standards and above all, by playing on fears that Labour would ruin things.
Eden was well liked by most people and wouldn't have to erase the Suez debacle to win the election. His drug/health problems would not be an issue in 1959.
IMO he wins with almost the same number of seats and would step down shortly after. By then Macmillan would be considered too old to take over and so it's either Butler, Hailsham or insert your own favourite.