[TR] NGK plugs for TR2

[agraham at execulink.com (Angelo Graham)]

Hello List:
Trying to source some NGK plugs locally for my '2. Time to retire the 
old KLGs.
  I take it that the TR2 can use the same NGK BP6HS as the TR3As, 
despite the slight increase in engine performance of the 3A. Also, the 
NGK catalog also lists a BPR6HS as the standard recommended plug for the 
TR3A. Does anyone know if this 'new' number supersedes the old BP6HS? 
Should I still ask for an NGK BP6HS?
Thanks for any help with this one.
Angelo Graham