AMC 360-401 Backing Plate Black Finish MZWP127SAMC 360 401 Backing Plate Black FinishMates With WP111 Pump MZWP127S WP127S This plate is often used when converting to an electric pump. Many of our pump designs are not able to completely enclose the original water chamber in the cast aluminum timing covers such as is found in the AMC application. Use this back plate to seal up the timing cover and successfully complete your water pump installation. Features: Fits AMC 360 401 style cover Designed to