With just 57 units produced, the rare Z11 V8 is the rarest Chevrolet engine ever and remains valuable today. The Z11 V8 was a powerful drag racing engine based on enhancements made to the 409 ci ...

Created for drag racers and NASCAR enthusiasts, the Z11 was essentially a lighter Impala with a bigger, more powerful V8. The latter was a 427-cubic-inch (7.0-liter) derived from the existing 409 ...

The Bel Air Impalas had a shorter greenhouse and a more extended deck, and they were powered by a 348 ci (5.7-liter) Turbo-Thrust V8. For the second ... you could opt for the Z11 package, so ...

These new V8 engines used a block that was larger ... super high-performance versions produced for 1963 (listed as RPO Z11, at a cost of $1,240), which carried a manufacturer's rating of 430 ...

For the new season, the Impala RPO-coded Z11 would be Chevrolet's top dragstrip contender-it ended up being a machine that went down in history as a very competitive vehicle. Though the bigger ...