NORS Main Bearing Set at -.001 by Johnson Bearing,  for Ford FE engines 1958 - 1964.  Fits 330, 332, 352, 361, 390, 391, 406, and 427 engines.  Like Federal Mogul PN 4020M, similar to Federal Mogul PN 4261M but with smaller OD thrust surfaces.  Johnson PN FD-776-CPX1.  These are full groove high performance bearings.  In original packaging.