Hello,

I have an instrument cluster I bought from someone off the list YEARS ago.  Thing is, I can't remember if it is  84,85,86 cluster.  It has  TACH.  any way to know what year it is from?   The reason I asked is I have a bostig conversion and want to upgrade to this cluster to get the TACH in dash.  I also need to know if 84,85 or 86 as 84 and 85 do not require Bostig's TACH modification as the 86 and newer does.   

Thanks