Early BRE Magazine Article

I found this early BRE article in an August 1970 Japanese Magazine.  There are several shop photos showing a 240Z and 510 or Bluebird.  Google translate says "Datsun 510 (Bluebird) will make adjustments to participate in the Mexican Road Race this year."  BRE participated in the 1969 Mexican 1000 (later renamed the Baja 1000) with a RHD four door Bluebird (which he reacquired several years ago).  I'm not sure if this is the same car being refurbished after the race or a new car.  With the several months lead time involved in publishing magazines back then I would assume the photos would be from April 1970 or earlier.  Google translate also says "Datsun Z (Fairlady Z) in production for racing this season."  I wonder if this was the original #46 car in development?  Per Road and Track magazine, BRE received their first 240Z in late January 1970 and it was one of the first 20 Z's to arrive in the US at the port of Los Angeles.  I showed this article to Pete Brock and John Morton at their recent open house (hence the signatures) but unfortunately they didn't really have a lot of information to add.  John did say he thought the #46 car was originally white from the factory though.