CREATE TABLE table_58588 ("Driver" TEXT, "Constructor" TEXT, "Laps" FLOAT, "Time/Retired" TEXT, "Grid" FLOAT)

What time did Carroll Shelby have in Grid 14?
SELECT "Time/Retired" FROM table_58588 WHERE "Grid" < '14' AND "Driver" = 'carroll shelby'
SELECT "Time/Retired" FROM "table_58588" WHERE "Driver" = 'carroll shelby' AND "Grid" < '14'