1. 305 cubic inch V8 (base engine): $1,000 - $2,500
2. 350 cubic inch V8: $1,500 - $3,500
3. 400 cubic inch V8: $2,000 - $4,500
4. Z28 350 cubic inch V8: $2,500 - $5,000
Again, these prices can vary significantly depending on various factors, so it's a good idea to research and shop around to find the best deal. Additionally, you may find engines for sale in various conditions and levels of restoration, which can also impact the price.