The motor plate is designed to bolt between the water pump and the timing cover and make installation and removal of the engine easier. The trapezoid shape allows this one piece design to strengthen the front of the chassis. Material is ¼" thick 6061-T6 aluminum, computer machined to accurately match the engine. Extra-large-sized trapezoidal shape (39x30x12") will fit Ford 429 or 460 water-pump-mount engine applications. Shipped complete with hardware and mounting tabs.