We make O-Ring Tool Register Plates, compatible with a popular industry tool used for creating precision o-ring grooves in engine block and head deck surfaces.  We control the tool register and dowels to 0.002″ true position, ensuring your o-ring and receiver grooves will be as perfectly aligned as possible.  We can build these for any engine family for which we have a deck design, and will add custom engine designs at no additional charge.  Call or email us for details.