Jegs Performance via eBay offers the Chevrolet Performance GM Goodwrench 350-Cubic-Inch Engine, model no. 10067353, for $1,319.99 with free shipping. That's $10 under our May mention and the lowest total price we could find now by $140, outside of other eBay vendors. This engine features a 4-bolt main, 260 horsepower, and 350 ft.