Here's why:
* Frame and Suspension: The Cavalier Z24's chassis is designed for a much smaller, lighter engine. A big-block Chevy is significantly heavier and more powerful, putting immense stress on the frame, suspension components, and axles. The car would likely twist and break under the strain.
* Transmission: The Z24's transmission is not designed to handle the torque of a big-block. It would likely fail very quickly.
* Rear Axle: The rear axle would be severely overloaded and likely fail.
* Mounting: Fitting the engine would require major fabrication work, potentially including custom engine mounts, a modified firewall, and modifications to the transmission tunnel.
* Weight Distribution: The added weight in the front would drastically alter the car's weight distribution, making it extremely difficult to handle and potentially dangerous.
While some people undertake incredibly ambitious projects, adapting a 1989 Cavalier Z24 to handle a 350 big-block would be a monumental and costly undertaking, likely requiring more work than building a custom car from scratch would. It's simply not a practical or safe modification.
