CREATE TABLE table_name_74 (victory_margin__in_lengths_ VARCHAR, time VARCHAR, finish VARCHAR, jockey VARCHAR)
What was the victory margin for a finish of 1st with a rider of Kent Desormeaux, with a time of 1:35.66?
SELECT victory_margin__in_lengths_ FROM table_name_74 WHERE finish = "1st" AND jockey = "kent desormeaux" AND time = "1:35.66"