* Engine Bay Space: While the Charger has a large engine bay, the 528 Hemi is substantially larger and heavier than even the biggest factory engines offered for that year. You'll likely need to modify or fabricate motor mounts, and possibly the firewall and inner fenders.
* Exhaust System: The exhaust system will need to be custom-fabricated to clear the larger engine and accommodate the increased displacement.
* Transmission: The transmission will need to be compatible with the 528 Hemi's torque and power output. This likely means a heavy-duty transmission and associated modifications to the driveshaft and rear end.
* Cooling System: The larger engine will require a more robust cooling system to prevent overheating. This might involve a larger radiator, upgraded water pump, and possibly an electric fan.
* Wiring Harness: The wiring harness might need modifications to accommodate the additional components of the 528 Hemi.
In short, while it's *possible* to fit a 528 Hemi into a 1972 Dodge Charger, it's a major undertaking requiring significant fabrication, mechanical expertise, and a substantial budget. It's not a project for a novice.
