Take a look at this incredible pro-touring 1973 Camaro. When the owner originally restored the car it featured a nice big block V8 but recently decided to go with a modern twin-turbo LQ4 V8 and two 67mm Precision turbochargers. You can view the previous build threads at NastyZ28 (build thread) and NastyZ28 (finished) when the motor was still a big block.
Source: LS1Tech