I have a b18a1 obd0, and its going into a 92 civic si. I'm getting ready to buy a head real soon. There's one thing i'm still not sure of. If my car is obd1, do I have to buy an obd1 head, or do i have to just swap the dizzy.

Thanks for any help.

 

The OBD of the head doesn't matter but you will need an OBD1 or OBD2 B series VTEC distributor if you are using an OBD1 ECU.

 

Yeah you need a 94 or 95 OBD1 GSR or B16 distributor. there are no differences in heads that the OBD level is concerned with, that's all in the manifold & block sensors and stuff.
Oh, I think you may be able to use 92-93 B17 distributors too..