Hi,
      If you want paint codes, Chris has listed them in the Oliver Forum section of this web site. Look at the first post. The brand of paint may not be available in your area, but I would bet it could be cross-referenced to the brand you would use.
 There is also a small book out that would have the info you need regarding what color to paint yours for the year of manufacture you have. 
   &quot;The Oliver Tractor Data Book&quot; by Brian Rukes.
   As for the wiring diagram, try Korves Oliver, they are listed in the links section of this site.... they are great to deal with!
   I'm scratching my head with regard to your white grill... I have a Super 66 that has a white grill and I'd swear that it is original.... everything on the tractor is original. So why would someone just paint the grill?? My suspicion is that the grill was originally yellow but the yellow faded to white because this had always been an &quot;outside&quot; tractor.
  Well, hope I've helped a little,
                  Cal