Fuel injectors - D1830GA versus D1830BA
Does anyone know the difference between D1830GA and D1830BA injectors? The truck I'm working on (a 1994 90 SE) reportedly had its injectors replaced at some point in the past, and they're marked with a blue band and "D1830BA". They appear to be otherwise identical to the original Lucas units, but with a different color stripe and part number suffix.
I can't find any documented difference between the -GA and -BA suffix, but I was hoping that someone might know.