Goldwater decides not to run in 1964 but decides to wait until 1968.
Nixon still runs in 1968 and wins most non-primary states. Goldwater wins mostly in the Southern and interior Western states. Nixon clinches the nomination before the GOP convention and selects Goldwater as his running mate (much to the joy of the southern delegations).
Nixon's presidency is the same as OTL. When Nixon resigns in 1974, Goldwater becomes President (Spiro Agnew remains Governor of Maryland until he loses reelection in 1970).