blackbird and busa injectors

[ajchop]

hey guys
are in a little delemer have mixed up blackbird injectors with a bunch of busa injectors can anyone tell me how to vissually tell the differance as they all look the same
cheers
aaron

[Maj]

Blackbird have gray filters or screens in the fuel inlet end , busa have black .
the numbers will not mean much for identifying as there more datecode than id