We put together an Upgrade Kit to allow you to replace the old PA Block on your Meyer E-47 or E-57. The Kit includes a brand new 16016 PA Block, Pin Type Couplers, A Cavity Plug, and Wiring Adapter. You just have to cut off the A Valve protection ring and install the A Cavity Plug. Then the PA Block bolts right on. We include new O Rings for the PA Block, and we include (2) Pin Type Coupler Sets and adapters to ensure you have no compatibility problems with your existing NPT Couplers since 16016 has SAE ports. The 16016 PA Block will also allow you to adjust the drop speed of the plow. Scroll through all the pictures.