NGK sparking plugs ?!

Hello spridgets,

      the guy who rebuilt my engine (thanx Paul A.!) installed
      Autolite 64 sparking plugs.... .. i think i'de like to try some
      NGK's as i hear nothing but good about them... the installed
      plugs are AUTOLITE 64. i just did a cross reference from that to
      NGK and got the following:

      TRADITIONAL PLUGS;
      BPR6ES
      BP5ES-11
      BPR5ES
      BPR5ES-11
      BP5ES SOLID
      BP6ES-13
      BPREY SOLID

      V-POWER PLUGS;
      GR4
      GR5
      ZGR5A
      BPR5EY=11
      BP5EY

      SUPER CLASS
      BPR5EV

      the question is, which NGK plug to use from all this..?
      the engine is a 1098 with a mild cam, pertronix, K&N's with
      stacks. no other mods.

      ??????????????????????????

Best regards,
 Bill                          mailto:pythias@pacifier.com
   '66 Sprite (HAN8L 49403)