With the artic temps we have been experiencing the last week I have been trying to learn as much as possible about how to decipher broadcast sheets. A lot of the stuff is pretty self explanatory but when you look at the build codes on the bottom they have the codes for the column and the wheel. I know the numbers are the last two numbers if the part number but then they have the color. X I know is black and F is green But what are the others? Like let’s say you have a 68 with a blue dash and column. What would the letter designation for that be? Would a B be the designation for blue? I have scoured the web and can’t find anything much so I figured why not ask. Need to learn as much as possible while folks are still here that know everything.