Did a 409 come in a 61?

Yes, the 409 was first produced in 1961 and installed in the Chevy Impala SS. But considering that only 142 cars were equipped with the 409 that year it would be an extremely rare car indeed. I have never seen one in a 1961 Impala. The very next year the 409 was installed in over 15,000 Impalas. The engine was last produced in 1965.