Table schema:
CREATE TABLE table_name_98 (engine VARCHAR, driver VARCHAR, tyre VARCHAR, chassis VARCHAR)

Question: Which engine was on a car with G tires, a chassis model of 003 002 004 005 006, driven by Jackie Stewart?
SQL: SELECT engine FROM table_name_98 WHERE tyre = "g" AND chassis = "003 002 004 005 006" AND driver = "jackie stewart"