B series wire harness Q's

[Space Cadet]

I have a 90 DA was originally an obd0, now has an obd1 b18a1. I need a new wire harness and was curious if the b18b harness was the same as a b18a? Any differences? and what differences between obd1 and obd0? any help and info is appreciated!

 

[Jabes]

im pretty sure its the distrubutor plugs, injector plugs and maybe one or two more that are different

 

[Space Cadet]

I think the injector plugs are the same. I want to know if the 2 big main plugs on the near the fuse box are different? Or if there is a different harness for cars with ABS? I don't have ABS...