So, require some sort of MCAT-like test but for law school? Not sure what you'd have to learn...history, political science, philosophy? English? All of those would arguably be on the LCAT.™ (Just made that up)
Some nations require prelaw specific undergrad to get into law school. In theory America could do that, and really none of those apply to law school other than English if you apply it to Legal Writing classes (as far as core classes go, not elective like law review, or Jurisprudence,etc)
I'd say more like ConLaw,PropertyLaw,CivPro,CrimLaw,CrimPro, all the 1L stuff pretty much.