I always wondered why but maybe its obvious and I just didn't figure out but why not use the power steering pump that came with the r&p (MM2 or T-bird) instead of buying special valves and shims to make the GM pump work with the f*rd r&p ? Maybe just bolt on a special bracket (I think Allen Grove is one company that makes accesory brackets )to adapt the pump to a small block chevy and then everything else would be stock - off the shelf parts available anywhere .