What kind of chassis did a winning car with a Foyt engine have in 1979?
CREATE TABLE "table1_1405704_1" (
  "season" real,
  "race_name" text,
  "winning_driver" text,
  "chassis" text,
  "engine" text,
  "tires" text,
  "team" text
);
SELECT "chassis" FROM "table1_1405704_1" WHERE "season"=1979 AND "engine"='Foyt';