Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_70 (year VARCHAR, chassis VARCHAR)

### Question ###
Which year did Ray Crawford the Kurtis Kraft 500g chassis?

### Accurate SQL ###

SELECT year FROM table_name_70 WHERE chassis = "kurtis kraft 500g"