What is the year when kurtis kraft 500f was the chassis?
CREATE TABLE table_name_46 (year INTEGER, chassis VARCHAR)
SELECT SUM(year) FROM table_name_46 WHERE chassis = "kurtis kraft 500f"
### Context: CREATE TABLE table_name_46 (year INTEGER, chassis VARCHAR) ### Question: What is the year when kurtis kraft 500f was the chassis? ### Answer: SELECT SUM(year) FROM table_name_46 WHERE chassis = "kurtis kraft 500f"