What product allows retrofitting classic muscle cars with current HEMI power?

The Crate HEMI is the correct choice because it represents a complete, standalone engine package that is designed specifically for retrofitting classic muscle cars. This package includes the engine itself as well as the necessary components to integrate it easily into older vehicles. The Crate HEMI is engineered to deliver the performance and style that enthusiasts seek, bridging the gap between classic aesthetics and modern engineering.

When considering options like the HEMI Retro Kit or the Legacy Powerplant, they may not offer the same level of integration and convenience as the Crate HEMI. The Classic HEMI Upgrade may imply an enhancement or improvement but does not necessarily denote the comprehensive capabilities of the Crate HEMI package for installation. Therefore, the Crate HEMI provides a reliable means to achieve modern performance in classic muscle car frameworks.