In the early 1950s, many hot-rodders could not afford to purchase and modify even a "cheap" flathead V-8, and a large investment in machine work and aftermarket parts was necessary to bring a Ford flathead V-8 to even the performance levels of most stock OHV V-8s available at the time. Even many inline six-cylinder engines from that period could be modified to produce more reliable and practical power than Ford V-8s, as the Ford flathead V-8 is saddled with many design features that make modifying it for true high-performance use difficult and expensive compared with other V-8s.