CREATE TABLE table_68609 ("Year" FLOAT, "Entrant" TEXT, "Chassis" TEXT, "Engine" TEXT, "Points" FLOAT)

What was the chassis when the entrant was Lavazza March, and the year was 1975?
SELECT "Chassis" FROM table_68609 WHERE "Entrant" = 'lavazza march' AND "Year" = '1975'
SELECT "Chassis" FROM "table_68609" WHERE "Entrant" = 'lavazza march' AND "Year" = '1975'