Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
How many points have 500cc for the class, a win greater than 0, with a year after 1974?

### Inputs:
table_name: table, columns: ['Year', 'Class', 'Team', 'Points', 'Wins']

### Response:
SELECT SUM Points FROM table WHERE Class = 500cc AND Wins > 0 AND Year > 1974