OBD2 A and B difference

mteg

Automatic Lover
I was wondering if anyone knew the difference in OBD2 A and B ecu's. A is for 96-99 and B is 00 and 01. I know the ecu's have a different style connector since boomslang offers 2 different wiring harnesses for them. I'm thinking of getting the AEM AIC (which they list as 96-99 compatible) and I want to know if there are any major differences besides just the port configuration.
 
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