How can you boost horsepower on a Ford 8N tractor without a lot of expense?

To boost horsepower on a Ford 8N tractor affordably, consider upgrading the air intake system with a high-flow air filter and ensuring the carburetor is properly tuned for optimal fuel-air mixture. Additionally, adjusting the timing can improve engine efficiency. Regular maintenance, such as changing spark plugs and using high-quality fuel, can also enhance performance without significant costs. Lastly, removing any unnecessary weight can help improve overall power-to-weight ratio.