Factors to Consider:
* Engine Size: Do you mean literal size (displacement) or power output?
* Engine Type: Gas or Diesel?
* Modifications: Are you willing to do extensive frame modifications, custom engine mounts, and potentially re-engineer the entire drivetrain?
* Legal Considerations: Depending on your location, there may be restrictions on engine swaps and emissions requirements.
Practical Options:
* Larger Gas V8s: You could swap in a larger gas engine like a 454ci Big Block or a 502ci crate engine. However, this would likely require significant modifications.
* Diesel Swaps: A common swap is a Duramax diesel engine from later models, but this will also require significant fabrication and potentially a new transmission.
* Supercharging/Turbocharging: Boosting an existing engine is a less drastic option for more power, but it requires expertise and can be expensive.
Unrealistic Options:
* Modern High-Performance Engines: While there are technically no size restrictions, fitting a modern high-power engine (e.g., a 6.2L supercharged V8) in an '87 Silverado would require major engineering, including custom mounts, axles, transmission, and more.
Recommendations:
* Research and Plan: Determine your goals and budget. Research potential engine swaps, consult with mechanics, and consider the costs and challenges.
* Consider the Drivetrain: Remember to upgrade the transmission, axles, and suspension to handle the additional power.
* Consult Professionals: If you're not mechanically inclined, work with experienced mechanics or specialized shops for the swap.
Remember: Engine swaps can be complex projects. It's best to start with a well-defined goal and a clear understanding of the required modifications.
