How good at you at guessing the Chevy small block and the year it was produced?

 Time to put on your thinking caps, VETTE readers!

For each engine, we'll give you a hint. You tell us the small-block Chevy engine and the year it was first produced.

 Let's get started.
2. This engine's RPO code had already been around for two years, but for this particular model year it received a 15hp increase.