[urq] VIN split

[Brandon Rogers]

Guys-
trying to determine a p/n and need help with deciphering the FA VIN split jargon....

it shows:

part   p/n    855-837-397 A
F                 >>85-E-900679

and 

part p/n       855-837-397 B
F  >>85-E-900680

what is the F - I'm thinking it's not part of the VIN b/c it stays to the left margin adn I'm thinking the "E" means '84 knowing that Eric's '86 is "G"...

my VIN is WAUDCO854EA900987 so I'm thinking  have the second p/n - suffix "B" 

TIA-

Brandon
'84 ur