Will a 1977 450 motor work in a 1974 350 Mercedes?

A 1977 450 motor can potentially work in a 1974 350 Mercedes, but it will require significant modifications. The engine mounts, transmission compatibility, and electronic systems may differ between the two models. It's important to consider the wiring harness and any necessary adaptations for proper integration. Consulting with a professional mechanic or specialist familiar with Mercedes models is advisable for a successful swap.