LBJ SAYS HE, WILBUR COHEN AND JOHN MACY HAVE REVIEWED MCCROCKLIN'S RECORD AND LBJ WOULD LIKE TO NOMINATE MCCROCKLIN AS UNDER SECRETARY OF HEW; COHEN ASKS TO MEET WITH MCCROCKLIN AS SOON AS POSSIBLE; MCCROCKLIN SAYS HE WILL GET BACK TO COHEN THIS AFTERNOON